Render Layers and Collections (merge from render-layers)

Design Documents
----------------

* https://wiki.blender.org/index.php/Dev:2.8/Source/Layers

* https://wiki.blender.org/index.php/Dev:2.8/Source/DataDesignRevised

User Commit Log
---------------

* New Layer and Collection system to replace render layers and viewport layers.

* A layer is a set of collections of objects (and their drawing options) required for specific tasks.

* A collection is a set of objects, equivalent of the old layers in Blender. A collection can be shared across multiple layers.

* All Scenes have a master collection that all other collections are children of.

* New collection "context" tab (in Properties Editor)

* New temporary viewport "collections" panel to control per-collection
visibility

Missing User Features
---------------------

* Collection "Filter"
  Option to add objects based on their names

* Collection Manager operators
  The existing buttons  are placeholders

* Collection Manager drawing
  The editor main region is empty

* Collection Override

* Per-Collection engine settings
  This will come as a separate commit, as part of the clay-engine branch

Dev Commit Log
--------------

* New DNA file (DNA_layer_types.h) with the new structs
  We are replacing Base by a new extended Base while keeping it backward
  compatible with some legacy settings (i.e., lay, flag_legacy).

  Renamed all Base to BaseLegacy to make it clear the areas of code that
  still need to be converted

  Note: manual changes were required on - deg_builder_nodes.h, rna_object.c, KX_Light.cpp

* Unittesting for main syncronization requirements
  - read, write, add/copy/remove objects, copy scene, collection
  link/unlinking, context)

* New Editor: Collection Manager
  Based on patch by Julian Eisel
  This is extracted from the layer-manager branch. With the following changes:

    - Renamed references of layer manager to collections manager

    - I doesn't include the editors/space_collections/ draw and util files

    - The drawing code itself will be implemented separately by Julian

* Base / Object:
  A little note about them. Original Blender code would try to keep them
  in sync through the code, juggling flags back and forth. This will now
  be handled by Depsgraph, keeping Object and Bases more separated
  throughout the non-rendering code.

  Scene.base is being cleared in doversion, and the old viewport drawing
  code was poorly converted to use the new bases while the new viewport
  code doesn't get merged and replace the old one.

Python API Changes
------------------

```
- scene.layers
+ # no longer exists

- scene.objects
+ scene.scene_layers.active.objects

- scene.objects.active
+ scene.render_layers.active.objects.active

- bpy.context.scene.objects.link()
+ bpy.context.scene_collection.objects.link()

- bpy_extras.object_utils.object_data_add(context, obdata, operator=None, use_active_layer=True, name=None)
+ bpy_extras.object_utils.object_data_add(context, obdata, operator=None, name=None)

- bpy.context.object.select
+ bpy.context.object.select = True
+ bpy.context.object.select = False
+ bpy.context.object.select_get()
+ bpy.context.object.select_set(action='SELECT')
+ bpy.context.object.select_set(action='DESELECT')

-AddObjectHelper.layers
+ # no longer exists
```

11 files changed, 340 insertions, 767 deletions

diff --git a/source/blender/editors/object/object_add.c b/source/blender/editors/object/object_add.c
index 02b2d8492b4..e7223f6f1ee 100644
--- a/source/blender/editors/object/object_add.c
+++ b/source/blender/editors/object/object_add.c
@@ -63,6 +63,7 @@
 #include "BKE_animsys.h"
 #include "BKE_armature.h"
 #include "BKE_camera.h"
+#include "BKE_collection.h"
 #include "BKE_context.h"
 #include "BKE_curve.h"
 #include "BKE_depsgraph.h"
@@ -73,6 +74,7 @@
 #include "BKE_group.h"
 #include "BKE_lamp.h"
 #include "BKE_lattice.h"
+#include "BKE_layer.h"
 #include "BKE_library.h"
 #include "BKE_library_query.h"
 #include "BKE_library_remap.h"
@@ -405,10 +407,11 @@ Object *ED_object_add_type(
         bContext *C,
         int type, const char *name,
         const float loc[3], const float rot[3],
-        bool enter_editmode, unsigned int layer)
+        bool enter_editmode, unsigned int UNUSED(layer))
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	Object *ob;
 
 	/* for as long scene has editmode... */
@@ -416,13 +419,12 @@ Object *ED_object_add_type(
 		ED_object_editmode_exit(C, EM_FREEDATA | EM_FREEUNDO | EM_WAITCURSOR | EM_DO_UNDO);  /* freedata, and undo */
 
 	/* deselects all, sets scene->basact */
-	ob = BKE_object_add(bmain, scene, type, name);
-	BASACT->lay = ob->lay = layer;
+	ob = BKE_object_add(bmain, scene, sl, type, name);
 	/* editor level activate, notifiers */
-	ED_base_object_activate(C, BASACT);
+	ED_object_base_activate(C, sl->basact);
 
 	/* more editor stuff */
-	ED_object_base_init_transform(C, BASACT, loc, rot);
+	ED_object_base_init_transform(C, sl->basact, loc, rot);
 
 	/* Ignore collisions by default for non-mesh objects */
 	if (type != OB_MESH) {
@@ -830,7 +832,7 @@ static int empty_drop_named_image_invoke(bContext *C, wmOperator *op, const wmEv
 {
 	Scene *scene = CTX_data_scene(C);
 
-	Base *base = NULL;
+	BaseLegacy *base = NULL;
 	Image *ima = NULL;
 	Object *ob = NULL;
 
@@ -1109,21 +1111,19 @@ static void object_delete_check_glsl_update(Object *ob)
 
 /* remove base from a specific scene */
 /* note: now unlinks constraints as well */
-void ED_base_object_free_and_unlink(Main *bmain, Scene *scene, Base *base)
+void ED_base_object_free_and_unlink(Main *bmain, Scene *scene, Object *ob)
 {
-	if (BKE_library_ID_is_indirectly_used(bmain, base->object) &&
-	    ID_REAL_USERS(base->object) <= 1 && ID_EXTRA_USERS(base->object) == 0)
+	if (BKE_library_ID_is_indirectly_used(bmain, ob) &&
+	    ID_REAL_USERS(ob) <= 1 && ID_EXTRA_USERS(ob) == 0)
 	{
 		/* We cannot delete indirectly used object... */
 		printf("WARNING, undeletable object '%s', should have been catched before reaching this function!",
-		       base->object->id.name + 2);
+		       ob->id.name + 2);
 		return;
 	}
 
-	BKE_scene_base_unlink(scene, base);
-	object_delete_check_glsl_update(base->object);
-	BKE_libblock_free_us(bmain, base->object);
-	MEM_freeN(base);
+	object_delete_check_glsl_update(ob);
+	BKE_collections_object_remove(bmain, scene, ob, true);
 	DAG_id_type_tag(bmain, ID_OB);
 }
 
@@ -1139,56 +1139,46 @@ static int object_delete_exec(bContext *C, wmOperator *op)
 	if (CTX_data_edit_object(C)) 
 		return OPERATOR_CANCELLED;
 
-	CTX_DATA_BEGIN (C, Base *, base, selected_bases)
+	CTX_DATA_BEGIN (C, Object *, ob, selected_objects)
 	{
-		const bool is_indirectly_used = BKE_library_ID_is_indirectly_used(bmain, base->object);
-		if (base->object->id.tag & LIB_TAG_INDIRECT) {
+		const bool is_indirectly_used = BKE_library_ID_is_indirectly_used(bmain, ob);
+		if (ob->id.tag & LIB_TAG_INDIRECT) {
 			/* Can this case ever happen? */
-			BKE_reportf(op->reports, RPT_WARNING, "Cannot delete indirectly linked object '%s'", base->object->id.name + 2);
+			BKE_reportf(op->reports, RPT_WARNING, "Cannot delete indirectly linked object '%s'", ob->id.name + 2);
 			continue;
 		}
-		else if (is_indirectly_used && ID_REAL_USERS(base->object) <= 1 && ID_EXTRA_USERS(base->object) == 0) {
+		else if (is_indirectly_used && ID_REAL_USERS(ob) <= 1 && ID_EXTRA_USERS(ob) == 0) {
 			BKE_reportf(op->reports, RPT_WARNING,
 			        "Cannot delete object '%s' from scene '%s', indirectly used objects need at least one user",
-			        base->object->id.name + 2, scene->id.name + 2);
+			        ob->id.name + 2, scene->id.name + 2);
 			continue;
 		}
 		/* remove from Grease Pencil parent */
 		for (bGPdata *gpd = bmain->gpencil.first; gpd; gpd = gpd->id.next) {
 			for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
 				if (gpl->parent != NULL) {
-					Object *ob = gpl->parent;
-					Object *curob = base->object;
-					if (ob == curob) {
+					if (gpl->parent == ob) {
 						gpl->parent = NULL;
 					}
 				}
 			}
 		}
 
-		/* deselect object -- it could be used in other scenes */
-		base->object->flag &= ~SELECT;
-
 		/* remove from current scene only */
-		ED_base_object_free_and_unlink(bmain, scene, base);
+		ED_base_object_free_and_unlink(bmain, scene, ob);
 		changed = true;
 
 		if (use_global) {
 			Scene *scene_iter;
-			Base *base_other;
-
 			for (scene_iter = bmain->scene.first; scene_iter; scene_iter = scene_iter->id.next) {
 				if (scene_iter != scene && !ID_IS_LINKED_DATABLOCK(scene_iter)) {
-					base_other = BKE_scene_base_find(scene_iter, base->object);
-					if (base_other) {
-						if (is_indirectly_used && ID_REAL_USERS(base->object) <= 1 && ID_EXTRA_USERS(base->object) == 0) {
-							BKE_reportf(op->reports, RPT_WARNING,
-							            "Cannot delete object '%s' from scene '%s', indirectly used objects need at least one user",
-							            base->object->id.name + 2, scene_iter->id.name + 2);
-							break;
-						}
-						ED_base_object_free_and_unlink(bmain, scene_iter, base_other);
+					if (is_indirectly_used && ID_REAL_USERS(ob) <= 1 && ID_EXTRA_USERS(ob) == 0) {
+						BKE_reportf(op->reports, RPT_WARNING,
+						            "Cannot delete object '%s' from scene '%s', indirectly used objects need at least one user",
+						            ob->id.name + 2, scene_iter->id.name + 2);
+						break;
 					}
+					ED_base_object_free_and_unlink(bmain, scene_iter, ob);
 				}
 			}
 		}
@@ -1329,6 +1319,7 @@ static void make_object_duplilist_real(bContext *C, Scene *scene, Base *base,
                                        const bool use_hierarchy)
 {
 	Main *bmain = CTX_data_main(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	ListBase *lb;
 	DupliObject *dob;
 	GHash *dupli_gh = NULL, *parent_gh = NULL;
@@ -1360,12 +1351,10 @@ static void make_object_duplilist_real(bContext *C, Scene *scene, Base *base,
 		 */
 		if (ob->mat == NULL) ob->totcol = 0;
 
-		basen = MEM_dupallocN(base);
-		basen->flag &= ~(OB_FROMDUPLI | OB_FROMGROUP);
-		ob->flag = basen->flag;
-		basen->lay = base->lay;
-		BLI_addhead(&scene->base, basen);   /* addhead: othwise eternal loop */
-		basen->object = ob;
+		BKE_collection_object_add_from(scene, dob->ob, ob);
+		basen = BKE_scene_layer_base_find(sl, ob);
+
+		BKE_scene_object_base_flag_sync_from_base(basen);
 
 		/* make sure apply works */
 		BKE_animdata_free(&ob->id, true);
@@ -1380,7 +1369,6 @@ static void make_object_duplilist_real(bContext *C, Scene *scene, Base *base,
 		BLI_listbase_clear(&ob->constraints);
 		ob->curve_cache = NULL;
 		ob->transflag &= ~OB_DUPLI;
-		ob->lay = base->lay;
 
 		copy_m4_m4(ob->obmat, dob->mat);
 		BKE_object_apply_mat4(ob, ob->obmat, false, false);
@@ -1589,7 +1577,7 @@ static int convert_poll(bContext *C)
 }
 
 /* Helper for convert_exec */
-static Base *duplibase_for_convert(Main *bmain, Scene *scene, Base *base, Object *ob)
+static Base *duplibase_for_convert(Main *bmain, Scene *scene, SceneLayer *sl, Base *base, Object *ob)
 {
 	Object *obn;
 	Base *basen;
@@ -1600,16 +1588,11 @@ static Base *duplibase_for_convert(Main *bmain, Scene *scene, Base *base, Object
 
 	obn = BKE_object_copy(bmain, ob);
 	DAG_id_tag_update(&ob->id, OB_RECALC_OB | OB_RECALC_DATA | OB_RECALC_TIME);
+	BKE_collection_object_add_from(scene, ob, obn);
 
-	basen = MEM_mallocN(sizeof(Base), "duplibase");
-	*basen = *base;
-	BLI_addhead(&scene->base, basen);   /* addhead: otherwise eternal loop */
-	basen->object = obn;
-	basen->flag |= SELECT;
-	obn->flag |= SELECT;
-	base->flag &= ~SELECT;
-	ob->flag &= ~SELECT;
-
+	basen = BKE_scene_layer_base_find(sl, obn);
+	ED_object_base_select(basen, BA_SELECT);
+	ED_object_base_select(basen, BA_DESELECT);
 	return basen;
 }
 
@@ -1617,6 +1600,7 @@ static int convert_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	Base *basen = NULL, *basact = NULL;
 	Object *ob, *ob1, *newob, *obact = CTX_data_active_object(C);
 	DerivedMesh *dm;
@@ -1631,7 +1615,7 @@ static int convert_exec(bContext *C, wmOperator *op)
 	/* don't forget multiple users! */
 
 	{
-		Base *base;
+		BaseLegacy *base;
 
 		for (base = scene->base.first; base; base = base->next) {
 			ob = base->object;
@@ -1678,7 +1662,7 @@ static int convert_exec(bContext *C, wmOperator *op)
 			ob->flag |= OB_DONE;
 
 			if (keep_original) {
-				basen = duplibase_for_convert(bmain, scene, base, NULL);
+				basen = duplibase_for_convert(bmain, scene, sl, base, NULL);
 				newob = basen->object;
 
 				/* decrement original mesh's usage count  */
@@ -1703,7 +1687,7 @@ static int convert_exec(bContext *C, wmOperator *op)
 			ob->flag |= OB_DONE;
 
 			if (keep_original) {
-				basen = duplibase_for_convert(bmain, scene, base, NULL);
+				basen = duplibase_for_convert(bmain, scene, sl, base, NULL);
 				newob = basen->object;
 
 				/* decrement original mesh's usage count  */
@@ -1735,7 +1719,7 @@ static int convert_exec(bContext *C, wmOperator *op)
 			ob->flag |= OB_DONE;
 
 			if (keep_original) {
-				basen = duplibase_for_convert(bmain, scene, base, NULL);
+				basen = duplibase_for_convert(bmain, scene, sl, base, NULL);
 				newob = basen->object;
 
 				/* decrement original curve's usage count  */
@@ -1806,7 +1790,7 @@ static int convert_exec(bContext *C, wmOperator *op)
 
 			if (target == OB_MESH) {
 				if (keep_original) {
-					basen = duplibase_for_convert(bmain, scene, base, NULL);
+					basen = duplibase_for_convert(bmain, scene, sl, base, NULL);
 					newob = basen->object;
 
 					/* decrement original curve's usage count  */
@@ -1841,7 +1825,7 @@ static int convert_exec(bContext *C, wmOperator *op)
 			if (!(baseob->flag & OB_DONE)) {
 				baseob->flag |= OB_DONE;
 
-				basen = duplibase_for_convert(bmain, scene, base, baseob);
+				basen = duplibase_for_convert(bmain, scene, sl, base, baseob);
 				newob = basen->object;
 
 				mb = newob->data;
@@ -1892,23 +1876,21 @@ static int convert_exec(bContext *C, wmOperator *op)
 
 	if (!keep_original) {
 		if (mballConverted) {
-			Base *base, *base_next;
-
-			for (base = scene->base.first; base; base = base_next) {
-				base_next = base->next;
-
-				ob = base->object;
+			Object *ob_mball;
+			FOREACH_SCENE_OBJECT(scene, ob_mball)
+			{
 				if (ob->type == OB_MBALL) {
 					if (ob->flag & OB_DONE) {
 						Object *ob_basis = NULL;
-						if (BKE_mball_is_basis(ob) ||
-						    ((ob_basis = BKE_mball_basis_find(scene, ob)) && (ob_basis->flag & OB_DONE)))
+						if (BKE_mball_is_basis(ob_mball) ||
+						    ((ob_basis = BKE_mball_basis_find(scene, ob_mball)) && (ob_basis->flag & OB_DONE)))
 						{
-							ED_base_object_free_and_unlink(bmain, scene, base);
+							ED_base_object_free_and_unlink(bmain, scene, ob_mball);
 						}
 					}
 				}
 			}
+			FOREACH_SCENE_OBJECT_END
 		}
 
 		/* delete object should renew depsgraph */
@@ -1920,12 +1902,12 @@ static int convert_exec(bContext *C, wmOperator *op)
 
 	if (basact) {
 		/* active base was changed */
-		ED_base_object_activate(C, basact);
-		BASACT = basact;
+		ED_object_base_activate(C, basact);
+		BASACT_NEW = basact;
 	}
-	else if (BASACT->object->flag & OB_DONE) {
-		WM_event_add_notifier(C, NC_OBJECT | ND_MODIFIER, BASACT->object);
-		WM_event_add_notifier(C, NC_OBJECT | ND_DATA, BASACT->object);
+	else if (BASACT_NEW->object->flag & OB_DONE) {
+		WM_event_add_notifier(C, NC_OBJECT | ND_MODIFIER, BASACT_NEW->object);
+		WM_event_add_notifier(C, NC_OBJECT | ND_DATA, BASACT_NEW->object);
 	}
 
 	DAG_relations_tag_update(bmain);
@@ -1967,18 +1949,17 @@ void OBJECT_OT_convert(wmOperatorType *ot)
 /* used below, assumes id.new is correct */
 /* leaves selection of base/object unaltered */
 /* Does set ID->newid pointers. */
-static Base *object_add_duplicate_internal(Main *bmain, Scene *scene, Base *base, int dupflag)
+static Base *object_add_duplicate_internal(Main *bmain, Scene *scene, SceneLayer *sl, Object *ob, int dupflag)
 {
 #define ID_NEW_REMAP_US(a)	if (      (a)->id.newid) { (a) = (void *)(a)->id.newid;       (a)->id.us++; }
 #define ID_NEW_REMAP_US2(a)	if (((ID *)a)->newid)    { (a) = ((ID  *)a)->newid;     ((ID *)a)->us++;    }
 
 	Base *basen = NULL;
 	Material ***matarar;
-	Object *ob, *obn;
+	Object *obn;
 	ID *id;
 	int a, didit;
 
-	ob = base->object;
 	if (ob->mode & OB_MODE_POSE) {
 		; /* nothing? */
 	}
@@ -1986,20 +1967,18 @@ static Base *object_add_duplicate_internal(Main *bmain, Scene *scene, Base *base
 		obn = ID_NEW_SET(ob, BKE_object_copy(bmain, ob));
 		DAG_id_tag_update(&obn->id, OB_RECALC_OB | OB_RECALC_DATA | OB_RECALC_TIME);
 
-		basen = MEM_mallocN(sizeof(Base), "duplibase");
-		*basen = *base;
-		BLI_addhead(&scene->base, basen);   /* addhead: prevent eternal loop */
-		basen->object = obn;
+		BKE_collection_object_add_from(scene, ob, obn);
+		basen = BKE_scene_layer_base_find(sl, obn);
 
 		/* 1) duplis should end up in same group as the original
 		 * 2) Rigid Body sim participants MUST always be part of a group...
 		 */
 		// XXX: is 2) really a good measure here?
-		if ((basen->flag & OB_FROMGROUP) || ob->rigidbody_object || ob->rigidbody_constraint) {
+		if ((ob->flag & OB_FROMGROUP) != 0 || ob->rigidbody_object || ob->rigidbody_constraint) {
 			Group *group;
 			for (group = bmain->group.first; group; group = group->id.next) {
 				if (BKE_group_object_exists(group, ob))
-					BKE_group_object_add(group, obn, scene, basen);
+					BKE_group_object_add(group, obn);
 			}
 		}
 
@@ -2207,14 +2186,14 @@ static Base *object_add_duplicate_internal(Main *bmain, Scene *scene, Base *base
  * note: don't call this within a loop since clear_* funcs loop over the entire database.
  * note: caller must do DAG_relations_tag_update(bmain);
  *       this is not done automatic since we may duplicate many objects in a batch */
-Base *ED_object_add_duplicate(Main *bmain, Scene *scene, Base *base, int dupflag)
+Base *ED_object_add_duplicate(Main *bmain, Scene *scene, SceneLayer *sl, Base *base, int dupflag)
 {
 	Base *basen;
 	Object *ob;
 
 	clear_sca_new_poins();  /* BGE logic */
 
-	basen = object_add_duplicate_internal(bmain, scene, base, dupflag);
+	basen = object_add_duplicate_internal(bmain, scene, sl, base->object, dupflag);
 	if (basen == NULL) {
 		return NULL;
 	}
@@ -2241,6 +2220,7 @@ static int duplicate_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	const bool linked = RNA_boolean_get(op->ptr, "linked");
 	int dupflag = (linked) ? 0 : U.dupflag;
 
@@ -2248,19 +2228,19 @@ static int duplicate_exec(bContext *C, wmOperator *op)
 
 	CTX_DATA_BEGIN (C, Base *, base, selected_bases)
 	{
-		Base *basen = object_add_duplicate_internal(bmain, scene, base, dupflag);
+		Base *basen = object_add_duplicate_internal(bmain, scene, sl, base->object, dupflag);
 
 		/* note that this is safe to do with this context iterator,
 		 * the list is made in advance */
-		ED_base_object_select(base, BA_DESELECT);
+		ED_object_base_select(base, BA_DESELECT);
 
 		if (basen == NULL) {
 			continue;
 		}
 
 		/* new object becomes active */
-		if (BASACT == base)
-			ED_base_object_activate(C, basen);
+		if (BASACT_NEW == base)
+			ED_object_base_activate(C, basen);
 
 		if (basen->object->data) {
 			DAG_id_tag_update(basen->object->data, 0);
@@ -2308,9 +2288,9 @@ static int add_named_exec(bContext *C, wmOperator *op)
 	wmWindow *win = CTX_wm_window(C);
 	const wmEvent *event = win ? win->eventstate : NULL;
 	Main *bmain = CTX_data_main(C);
-	View3D *v3d = CTX_wm_view3d(C);  /* may be NULL */
 	Scene *scene = CTX_data_scene(C);
-	Base *basen, *base;
+	SceneLayer *sl = CTX_data_scene_layer(C);
+	Base *basen;
 	Object *ob;
 	const bool linked = RNA_boolean_get(op->ptr, "linked");
 	int dupflag = (linked) ? 0 : U.dupflag;
@@ -2325,22 +2305,17 @@ static int add_named_exec(bContext *C, wmOperator *op)
 		return OPERATOR_CANCELLED;
 	}
 
-	base = MEM_callocN(sizeof(Base), "duplibase");
-	base->object = ob;
-	base->flag = ob->flag;
-
 	/* prepare dupli */
 	clear_sca_new_poins();  /* BGE logic */
 
-	basen = object_add_duplicate_internal(bmain, scene, base, dupflag);
+	basen = object_add_duplicate_internal(bmain, scene, sl, ob, dupflag);
+	BKE_scene_object_base_flag_sync_from_object(basen);
 
 	if (basen == NULL) {
-		MEM_freeN(base);
 		BKE_report(op->reports, RPT_ERROR, "Object could not be duplicated");
 		return OPERATOR_CANCELLED;
 	}
 
-	basen->lay = basen->object->lay = BKE_screen_view3d_layer_active(v3d, scene);
 	basen->object->restrictflag &= ~OB_RESTRICT_VIEW;
 
 	if (event) {
@@ -2351,8 +2326,8 @@ static int add_named_exec(bContext *C, wmOperator *op)
 		ED_view3d_cursor3d_position(C, basen->object->loc, mval);
 	}
 	
-	ED_base_object_select(basen, BA_SELECT);
-	ED_base_object_activate(C, basen);
+	ED_object_base_select(basen, BA_SELECT);
+	ED_object_base_activate(C, basen);
 
 	copy_object_set_idnew(C);
 
@@ -2360,8 +2335,6 @@ static int add_named_exec(bContext *C, wmOperator *op)
 
 	DAG_relations_tag_update(bmain);
 
-	MEM_freeN(base);
-
 	WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT | ND_OB_ACTIVE, scene);
 
 	return OPERATOR_FINISHED;
diff --git a/source/blender/editors/object/object_constraint.c b/source/blender/editors/object/object_constraint.c
index 59d78f13ccb..1cd80327b42 100644
--- a/source/blender/editors/object/object_constraint.c
+++ b/source/blender/editors/object/object_constraint.c
@@ -1682,11 +1682,12 @@ static bool get_new_constraint_target(bContext *C, int con_type, Object **tar_ob
 	if ((found == false) && (add)) {
 		Main *bmain = CTX_data_main(C);
 		Scene *scene = CTX_data_scene(C);
-		Base *base = BASACT, *newbase = NULL;
+		SceneLayer *sl = CTX_data_scene_layer(C);
+		BaseLegacy *base = BASACT, *newbase = NULL;
 		Object *obt;
 		
 		/* add new target object */
-		obt = BKE_object_add(bmain, scene, OB_EMPTY, NULL);
+		obt = BKE_object_add(bmain, scene, sl, OB_EMPTY, NULL);
 		
 		/* set layers OK */
 		newbase = BASACT;
@@ -1709,7 +1710,7 @@ static bool get_new_constraint_target(bContext *C, int con_type, Object **tar_ob
 
 		/* restore, BKE_object_add sets active */
 		BASACT = base;
-		base->flag |= SELECT;
+		base->flag_legacy |= SELECT;
 		
 		/* make our new target the new object */
 		*tar_ob = obt;
diff --git a/source/blender/editors/object/object_edit.c b/source/blender/editors/object/object_edit.c
index edd7b5dd1be..2a4557f3610 100644
--- a/source/blender/editors/object/object_edit.c
+++ b/source/blender/editors/object/object_edit.c
@@ -132,189 +132,6 @@ Object *ED_object_active_context(bContext *C)
 }
 
 
-/* ********* clear/set restrict view *********/
-static int object_hide_view_clear_exec(bContext *C, wmOperator *UNUSED(op))
-{
-	Main *bmain = CTX_data_main(C);
-	ScrArea *sa = CTX_wm_area(C);
-	View3D *v3d = sa->spacedata.first;
-	Scene *scene = CTX_data_scene(C);
-	Base *base;
-	bool changed = false;
-	
-	/* XXX need a context loop to handle such cases */
-	for (base = FIRSTBASE; base; base = base->next) {
-		if ((base->lay & v3d->lay) && base->object->restrictflag & OB_RESTRICT_VIEW) {
-			if (!(base->object->restrictflag & OB_RESTRICT_SELECT)) {
-				base->flag |= SELECT;
-			}
-			base->object->flag = base->flag;
-			base->object->restrictflag &= ~OB_RESTRICT_VIEW; 
-			changed = true;
-		}
-	}
-	if (changed) {
-		DAG_id_type_tag(bmain, ID_OB);
-		DAG_relations_tag_update(bmain);
-		WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT, scene);
-	}
-
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_hide_view_clear(wmOperatorType *ot)
-{
-	
-	/* identifiers */
-	ot->name = "Clear Restrict View";
-	ot->description = "Reveal the object by setting the hide flag";
-	ot->idname = "OBJECT_OT_hide_view_clear";
-	
-	/* api callbacks */
-	ot->exec = object_hide_view_clear_exec;
-	ot->poll = ED_operator_view3d_active;
-	
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-}
-
-static int object_hide_view_set_exec(bContext *C, wmOperator *op)
-{
-	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
-	bool changed = false;
-	const bool unselected = RNA_boolean_get(op->ptr, "unselected");
-	
-	CTX_DATA_BEGIN(C, Base *, base, visible_bases)
-	{
-		if (!unselected) {
-			if (base->flag & SELECT) {
-				base->flag &= ~SELECT;
-				base->object->flag = base->flag;
-				base->object->restrictflag |= OB_RESTRICT_VIEW;
-				changed = true;
-				if (base == BASACT) {
-					ED_base_object_activate(C, NULL);
-				}
-			}
-		}
-		else {
-			if (!(base->flag & SELECT)) {
-				base->object->restrictflag |= OB_RESTRICT_VIEW;
-				changed = true;
-				if (base == BASACT) {
-					ED_base_object_activate(C, NULL);
-				}
-			}
-		}
-	}
-	CTX_DATA_END;
-
-	if (changed) {
-		DAG_id_type_tag(bmain, ID_OB);
-		DAG_relations_tag_update(bmain);
-		
-		WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT, scene);
-		
-	}
-
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_hide_view_set(wmOperatorType *ot)
-{
-	/* identifiers */
-	ot->name = "Set Restrict View";
-	ot->description = "Hide the object by setting the hide flag";
-	ot->idname = "OBJECT_OT_hide_view_set";
-	
-	/* api callbacks */
-	ot->exec = object_hide_view_set_exec;
-	ot->poll = ED_operator_view3d_active;
-	
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-	
-	RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
-	
-}
-
-/* 99% same as above except no need for scene refreshing (TODO, update render preview) */
-static int object_hide_render_clear_exec(bContext *C, wmOperator *UNUSED(op))
-{
-	bool changed = false;
-
-	/* XXX need a context loop to handle such cases */
-	CTX_DATA_BEGIN(C, Object *, ob, selected_editable_objects)
-	{
-		if (ob->restrictflag & OB_RESTRICT_RENDER) {
-			ob->restrictflag &= ~OB_RESTRICT_RENDER;
-			changed = true;
-		}
-	}
-	CTX_DATA_END;
-
-	if (changed)
-		WM_event_add_notifier(C, NC_SPACE | ND_SPACE_OUTLINER, NULL);
-
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_hide_render_clear(wmOperatorType *ot)
-{
-
-	/* identifiers */
-	ot->name = "Clear Restrict Render";
-	ot->description = "Reveal the render object by setting the hide render flag";
-	ot->idname = "OBJECT_OT_hide_render_clear";
-
-	/* api callbacks */
-	ot->exec = object_hide_render_clear_exec;
-	ot->poll = ED_operator_view3d_active;
-
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-}
-
-static int object_hide_render_set_exec(bContext *C, wmOperator *op)
-{
-	const bool unselected = RNA_boolean_get(op->ptr, "unselected");
-
-	CTX_DATA_BEGIN(C, Base *, base, visible_bases)
-	{
-		if (!unselected) {
-			if (base->flag & SELECT) {
-				base->object->restrictflag |= OB_RESTRICT_RENDER;
-			}
-		}
-		else {
-			if (!(base->flag & SELECT)) {
-				base->object->restrictflag |= OB_RESTRICT_RENDER;
-			}
-		}
-	}
-	CTX_DATA_END;
-	WM_event_add_notifier(C, NC_SPACE | ND_SPACE_OUTLINER, NULL);
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_hide_render_set(wmOperatorType *ot)
-{
-	/* identifiers */
-	ot->name = "Set Restrict Render";
-	ot->description = "Hide the render object by setting the hide render flag";
-	ot->idname = "OBJECT_OT_hide_render_set";
-
-	/* api callbacks */
-	ot->exec = object_hide_render_set_exec;
-	ot->poll = ED_operator_view3d_active;
-
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-
-	RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected objects");
-}
-
 /* ******************* toggle editmode operator  ***************** */
 
 static bool mesh_needs_keyindex(const Mesh *me)
@@ -465,31 +282,22 @@ void ED_object_editmode_exit(bContext *C, int flag)
 void ED_object_editmode_enter(bContext *C, int flag)
 {
 	Scene *scene = CTX_data_scene(C);
-	Base *base = NULL;
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	Object *ob;
-	ScrArea *sa = CTX_wm_area(C);
-	View3D *v3d = NULL;
 	bool ok = false;
 
 	if (ID_IS_LINKED_DATABLOCK(scene)) return;
 
-	if (sa && sa->spacetype == SPACE_VIEW3D)
-		v3d = sa->spacedata.first;
-
 	if ((flag & EM_IGNORE_LAYER) == 0) {
-		base = CTX_data_active_base(C); /* active layer checked here for view3d */
+		ob = CTX_data_active_object(C); /* active layer checked here for view3d */
 
-		if (base == NULL) return;
-		else if (v3d && (base->lay & v3d->lay) == 0) return;
-		else if (!v3d && (base->lay & scene->lay) == 0) return;
+		if (ob == NULL) return;
 	}
 	else {
-		base = scene->basact;
+		ob = sl->basact->object;
 	}
 
-	if (ELEM(NULL, base, base->object, base->object->data)) return;
-
-	ob = base->object;
+	if (ELEM(NULL, ob, ob->data)) return;
 
 	/* this checks actual object->data, for cases when other scenes have it in editmode context */
 	if (BKE_object_is_in_editmode(ob))
@@ -698,7 +506,7 @@ static void copymenu_properties(Scene *scene, View3D *v3d, Object *ob)
 {	
 //XXX no longer used - to be removed - replaced by game_properties_copy_exec
 	bProperty *prop;
-	Base *base;
+	BaseLegacy *base;
 	int nr, tot = 0;
 	char *str;
 	
@@ -758,7 +566,7 @@ static void copymenu_properties(Scene *scene, View3D *v3d, Object *ob)
 static void copymenu_logicbricks(Scene *scene, View3D *v3d, Object *ob)
 {
 //XXX no longer used - to be removed - replaced by logicbricks_copy_exec
-	Base *base;
+	BaseLegacy *base;
 	
 	for (base = FIRSTBASE; base; base = base->next) {
 		if (base->object != ob) {
@@ -844,7 +652,7 @@ static void copy_texture_space(Object *to, Object *ob)
 static void copy_attr(Main *bmain, Scene *scene, View3D *v3d, short event)
 {
 	Object *ob;
-	Base *base;
+	BaseLegacy *base;
 	Curve *cu, *cu1;
 	Nurb *nu;
 	bool do_depgraph_update = false;
@@ -1512,7 +1320,7 @@ void OBJECT_OT_shade_smooth(wmOperatorType *ot)
 static void UNUSED_FUNCTION(image_aspect) (Scene *scene, View3D *v3d)
 {
 	/* all selected objects with an image map: scale in image aspect */
-	Base *base;
+	BaseLegacy *base;
 	Object *ob;
 	Material *ma;
 	Tex *tex;
diff --git a/source/blender/editors/object/object_group.c b/source/blender/editors/object/object_group.c
index 0fe43c44d7d..b22b034ecab 100644
--- a/source/blender/editors/object/object_group.c
+++ b/source/blender/editors/object/object_group.c
@@ -128,7 +128,6 @@ static int objects_add_active_exec(bContext *C, wmOperator *op)
 {
 	Object *ob = ED_object_context(C);
 	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
 	int single_group_index = RNA_enum_get(op->ptr, "group");
 	Group *single_group = group_object_active_find_index(ob, single_group_index);
 	Group *group;
@@ -151,7 +150,7 @@ static int objects_add_active_exec(bContext *C, wmOperator *op)
 				continue;
 
 			if (!BKE_group_object_cyclic_check(bmain, base->object, group)) {
-				BKE_group_object_add(group, base->object, scene, base);
+				BKE_group_object_add(group, base->object);
 				updated = true;
 			}
 			else {
@@ -200,8 +199,8 @@ void GROUP_OT_objects_add_active(wmOperatorType *ot)
 static int objects_remove_active_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
-	Object *ob = OBACT;
+	SceneLayer *sl = CTX_data_scene_layer(C);
+	Object *ob = OBACT_NEW;
 	int single_group_index = RNA_enum_get(op->ptr, "group");
 	Group *single_group = group_object_active_find_index(ob, single_group_index);
 	Group *group;
@@ -221,7 +220,7 @@ static int objects_remove_active_exec(bContext *C, wmOperator *op)
 			/* Remove groups from selected objects */
 			CTX_DATA_BEGIN (C, Base *, base, selected_editable_bases)
 			{
-				BKE_group_object_unlink(group, base->object, scene, base);
+				BKE_group_object_unlink(group, base->object);
 				ok = 1;
 			}
 			CTX_DATA_END;
@@ -264,11 +263,10 @@ void GROUP_OT_objects_remove_active(wmOperatorType *ot)
 static int group_objects_remove_all_exec(bContext *C, wmOperator *UNUSED(op))
 {
 	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
 
 	CTX_DATA_BEGIN (C, Base *, base, selected_editable_bases)
 	{
-		BKE_object_groups_clear(scene, base, base->object);
+		BKE_object_groups_clear(base->object);
 	}
 	CTX_DATA_END;
 
@@ -297,7 +295,6 @@ static int group_objects_remove_exec(bContext *C, wmOperator *op)
 {
 	Object *ob = ED_object_context(C);
 	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
 	int single_group_index = RNA_enum_get(op->ptr, "group");
 	Group *single_group = group_object_active_find_index(ob, single_group_index);
 	Group *group;
@@ -315,7 +312,7 @@ static int group_objects_remove_exec(bContext *C, wmOperator *op)
 		/* now remove all selected objects from the group */
 		CTX_DATA_BEGIN (C, Base *, base, selected_editable_bases)
 		{
-			BKE_group_object_unlink(group, base->object, scene, base);
+			BKE_group_object_unlink(group, base->object);
 			updated = true;
 		}
 		CTX_DATA_END;
@@ -357,7 +354,6 @@ void GROUP_OT_objects_remove(wmOperatorType *ot)
 static int group_create_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
 	Group *group = NULL;
 	char name[MAX_ID_NAME - 2]; /* id name */
 	
@@ -367,7 +363,7 @@ static int group_create_exec(bContext *C, wmOperator *op)
 		
 	CTX_DATA_BEGIN (C, Base *, base, selected_bases)
 	{
-		BKE_group_object_add(group, base->object, scene, base);
+		BKE_group_object_add(group, base->object);
 	}
 	CTX_DATA_END;
 
@@ -398,7 +394,6 @@ void GROUP_OT_create(wmOperatorType *ot)
 
 static int group_add_exec(bContext *C, wmOperator *UNUSED(op))
 {
-	Scene *scene = CTX_data_scene(C);
 	Object *ob = ED_object_context(C);
 	Main *bmain = CTX_data_main(C);
 	Group *group;
@@ -407,7 +402,7 @@ static int group_add_exec(bContext *C, wmOperator *UNUSED(op))
 		return OPERATOR_CANCELLED;
 
 	group = BKE_group_add(bmain, "Group");
-	BKE_group_object_add(group, ob, scene, NULL);
+	BKE_group_object_add(group, ob);
 
 	WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob);
 
@@ -432,7 +427,6 @@ void OBJECT_OT_group_add(wmOperatorType *ot)
 static int group_link_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
 	Object *ob = ED_object_context(C);
 	Group *group = BLI_findlink(&bmain->group, RNA_enum_get(op->ptr, "group"));
 
@@ -457,7 +451,7 @@ static int group_link_exec(bContext *C, wmOperator *op)
 		return OPERATOR_CANCELLED;
 	}
 
-	BKE_group_object_add(group, ob, scene, NULL);
+	BKE_group_object_add(group, ob);
 
 	WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob);
 
@@ -490,14 +484,13 @@ void OBJECT_OT_group_link(wmOperatorType *ot)
 
 static int group_remove_exec(bContext *C, wmOperator *UNUSED(op))
 {
-	Scene *scene = CTX_data_scene(C);
 	Object *ob = ED_object_context(C);
 	Group *group = CTX_data_pointer_get_type(C, "group", &RNA_Group).data;
 
 	if (!ob || !group)
 		return OPERATOR_CANCELLED;
 
-	BKE_group_object_unlink(group, ob, scene, NULL); /* base will be used if found */
+	BKE_group_object_unlink(group, ob);
 
 	WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob);
 	
@@ -560,8 +553,10 @@ static int select_grouped_exec(bContext *C, wmOperator *UNUSED(op))  /* Select o
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if (!(base->flag & SELECT) && BKE_group_object_exists(group, base->object)) {
-			ED_base_object_select(base, BA_SELECT);
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
+			if (BKE_group_object_exists(group, base->object)) {
+				ED_object_base_select(base, BA_SELECT);
+			}
 		}
 	}
 	CTX_DATA_END;
diff --git a/source/blender/editors/object/object_hook.c b/source/blender/editors/object/object_hook.c
index 438c10c51fa..f41f21f5bd4 100644
--- a/source/blender/editors/object/object_hook.c
+++ b/source/blender/editors/object/object_hook.c
@@ -445,12 +445,12 @@ static int hook_op_edit_poll(bContext *C)
 	return 0;
 }
 
-static Object *add_hook_object_new(Main *bmain, Scene *scene, Object *obedit)
+static Object *add_hook_object_new(Main *bmain, Scene *scene, SceneLayer *sl, Object *obedit)
 {
-	Base *base, *basedit;
+	BaseLegacy *base, *basedit;
 	Object *ob;
 
-	ob = BKE_object_add(bmain, scene, OB_EMPTY, NULL);
+	ob = BKE_object_add(bmain, scene, sl, OB_EMPTY, NULL);
 	
 	basedit = BKE_scene_base_find(scene, obedit);
 	base = scene->basact;
@@ -464,7 +464,7 @@ static Object *add_hook_object_new(Main *bmain, Scene *scene, Object *obedit)
 	return ob;
 }
 
-static int add_hook_object(Main *bmain, Scene *scene, Object *obedit, Object *ob, int mode, ReportList *reports)
+static int add_hook_object(Main *bmain, Scene *scene, SceneLayer *sl, Object *obedit, Object *ob, int mode, ReportList *reports)
 {
 	ModifierData *md = NULL;
 	HookModifierData *hmd = NULL;
@@ -482,7 +482,7 @@ static int add_hook_object(Main *bmain, Scene *scene, Object *obedit, Object *ob
 
 	if (mode == OBJECT_ADDHOOK_NEWOB && !ob) {
 		
-		ob = add_hook_object_new(bmain, scene, obedit);
+		ob = add_hook_object_new(bmain, scene, sl, obedit);
 		
 		/* transform cent to global coords for loc */
 		mul_v3_m4v3(ob->loc, obedit->obmat, cent);
@@ -556,6 +556,7 @@ static int object_add_hook_selob_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	Object *obedit = CTX_data_edit_object(C);
 	Object *obsel = NULL;
 	const bool use_bone = RNA_boolean_get(op->ptr, "use_bone");
@@ -580,7 +581,7 @@ static int object_add_hook_selob_exec(bContext *C, wmOperator *op)
 		return OPERATOR_CANCELLED;
 	}
 	
-	if (add_hook_object(bmain, scene, obedit, obsel, mode, op->reports)) {
+	if (add_hook_object(bmain, scene, sl, obedit, obsel, mode, op->reports)) {
 		WM_event_add_notifier(C, NC_OBJECT | ND_MODIFIER, obedit);
 		return OPERATOR_FINISHED;
 	}
@@ -611,9 +612,10 @@ static int object_add_hook_newob_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	Object *obedit = CTX_data_edit_object(C);
 
-	if (add_hook_object(bmain, scene, obedit, NULL, OBJECT_ADDHOOK_NEWOB, op->reports)) {
+	if (add_hook_object(bmain, scene, sl, obedit, NULL, OBJECT_ADDHOOK_NEWOB, op->reports)) {
 		WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT, scene);
 		WM_event_add_notifier(C, NC_OBJECT | ND_MODIFIER, obedit);
 		return OPERATOR_FINISHED;
diff --git a/source/blender/editors/object/object_intern.h b/source/blender/editors/object/object_intern.h
index 9710e4f843d..fe0ceb15d70 100644
--- a/source/blender/editors/object/object_intern.h
+++ b/source/blender/editors/object/object_intern.h
@@ -70,7 +70,6 @@ void OBJECT_OT_make_local(struct wmOperatorType *ot);
 void OBJECT_OT_make_single_user(struct wmOperatorType *ot);
 void OBJECT_OT_make_links_scene(struct wmOperatorType *ot);
 void OBJECT_OT_make_links_data(struct wmOperatorType *ot);
-void OBJECT_OT_move_to_layer(struct wmOperatorType *ot);
 void OBJECT_OT_drop_named_material(struct wmOperatorType *ot);
 void OBJECT_OT_unlink_data(struct wmOperatorType *ot);
 
@@ -78,10 +77,6 @@ void OBJECT_OT_unlink_data(struct wmOperatorType *ot);
 void OBJECT_OT_mode_set(struct wmOperatorType *ot);
 void OBJECT_OT_editmode_toggle(struct wmOperatorType *ot);
 void OBJECT_OT_posemode_toggle(struct wmOperatorType *ot);
-void OBJECT_OT_hide_view_set(struct wmOperatorType *ot);
-void OBJECT_OT_hide_view_clear(struct wmOperatorType *ot);
-void OBJECT_OT_hide_render_set(struct wmOperatorType *ot);
-void OBJECT_OT_hide_render_clear(struct wmOperatorType *ot);
 void OBJECT_OT_proxy_make(struct wmOperatorType *ot);
 void OBJECT_OT_shade_smooth(struct wmOperatorType *ot);
 void OBJECT_OT_shade_flat(struct wmOperatorType *ot);
diff --git a/source/blender/editors/object/object_modifier.c b/source/blender/editors/object/object_modifier.c
index 06f495fb9f1..bca7a163e90 100644
--- a/source/blender/editors/object/object_modifier.c
+++ b/source/blender/editors/object/object_modifier.c
@@ -411,7 +411,7 @@ int ED_object_modifier_move_down(ReportList *reports, Object *ob, ModifierData *
 	return 1;
 }
 
-int ED_object_modifier_convert(ReportList *UNUSED(reports), Main *bmain, Scene *scene, Object *ob, ModifierData *md)
+int ED_object_modifier_convert(ReportList *UNUSED(reports), Main *bmain, Scene *scene, SceneLayer *sl, Object *ob, ModifierData *md)
 {
 	Object *obn;
 	ParticleSystem *psys;
@@ -463,7 +463,7 @@ int ED_object_modifier_convert(ReportList *UNUSED(reports), Main *bmain, Scene *
 	if (totvert == 0) return 0;
 
 	/* add new mesh */
-	obn = BKE_object_add(bmain, scene, OB_MESH, NULL);
+	obn = BKE_object_add(bmain, scene, sl, OB_MESH, NULL);
 	me = obn->data;
 	
 	me->totvert = totvert;
@@ -1048,10 +1048,11 @@ static int modifier_convert_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	Object *ob = ED_object_active_context(C);
 	ModifierData *md = edit_modifier_property_get(op, ob, 0);
 	
-	if (!md || !ED_object_modifier_convert(op->reports, bmain, scene, ob, md))
+	if (!md || !ED_object_modifier_convert(op->reports, bmain, scene, sl, ob, md))
 		return OPERATOR_CANCELLED;
 
 	DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
@@ -1683,7 +1684,7 @@ static void skin_armature_bone_create(Object *skin_ob,
 	}
 }
 
-static Object *modifier_skin_armature_create(Main *bmain, Scene *scene, Object *skin_ob)
+static Object *modifier_skin_armature_create(Main *bmain, Scene *scene, SceneLayer *sl, Object *skin_ob)
 {
 	BLI_bitmap *edges_visited;
 	DerivedMesh *deform_dm;
@@ -1706,7 +1707,7 @@ static Object *modifier_skin_armature_create(Main *bmain, Scene *scene, Object *
 	                     NULL,
 	                     me->totvert);
 	
-	arm_ob = BKE_object_add(bmain, scene, OB_ARMATURE, NULL);
+	arm_ob = BKE_object_add(bmain, scene, sl, OB_ARMATURE, NULL);
 	BKE_object_transform_copy(arm_ob, skin_ob);
 	arm = arm_ob->data;
 	arm->layer = 1;
@@ -1765,6 +1766,7 @@ static int skin_armature_create_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	Object *ob = CTX_data_active_object(C), *arm_ob;
 	Mesh *me = ob->data;
 	ModifierData *skin_md;
@@ -1776,7 +1778,7 @@ static int skin_armature_create_exec(bContext *C, wmOperator *op)
 	}
 
 	/* create new armature */
-	arm_ob = modifier_skin_armature_create(bmain, scene, ob);
+	arm_ob = modifier_skin_armature_create(bmain, scene, sl, ob);
 
 	/* add a modifier to connect the new armature to the mesh */
 	arm_md = (ArmatureModifierData *)modifier_new(eModifierType_Armature);
diff --git a/source/blender/editors/object/object_ops.c b/source/blender/editors/object/object_ops.c
index 7e7e1ef182c..19526db2ce8 100644
--- a/source/blender/editors/object/object_ops.c
+++ b/source/blender/editors/object/object_ops.c
@@ -67,10 +67,6 @@ void ED_operatortypes_object(void)
 	WM_operatortype_append(OBJECT_OT_editmode_toggle);
 	WM_operatortype_append(OBJECT_OT_posemode_toggle);
 	WM_operatortype_append(OBJECT_OT_proxy_make);
-	WM_operatortype_append(OBJECT_OT_hide_view_clear);
-	WM_operatortype_append(OBJECT_OT_hide_view_set);
-	WM_operatortype_append(OBJECT_OT_hide_render_clear);
-	WM_operatortype_append(OBJECT_OT_hide_render_set);
 	WM_operatortype_append(OBJECT_OT_shade_smooth);
 	WM_operatortype_append(OBJECT_OT_shade_flat);
 	WM_operatortype_append(OBJECT_OT_paths_calculate);
@@ -90,13 +86,11 @@ void ED_operatortypes_object(void)
 	WM_operatortype_append(OBJECT_OT_make_single_user);
 	WM_operatortype_append(OBJECT_OT_make_links_scene);
 	WM_operatortype_append(OBJECT_OT_make_links_data);
-	WM_operatortype_append(OBJECT_OT_move_to_layer);
 
 	WM_operatortype_append(OBJECT_OT_select_random);
 	WM_operatortype_append(OBJECT_OT_select_all);
 	WM_operatortype_append(OBJECT_OT_select_same_group);
 	WM_operatortype_append(OBJECT_OT_select_by_type);
-	WM_operatortype_append(OBJECT_OT_select_by_layer);
 	WM_operatortype_append(OBJECT_OT_select_linked);
 	WM_operatortype_append(OBJECT_OT_select_grouped);
 	WM_operatortype_append(OBJECT_OT_select_mirror);
@@ -382,25 +376,6 @@ void ED_keymap_object(wmKeyConfig *keyconf)
 	
 	WM_keymap_verify_item(keymap, "OBJECT_OT_origin_clear", OKEY, KM_PRESS, KM_ALT, 0);
 	
-	WM_keymap_add_item(keymap, "OBJECT_OT_hide_view_clear", HKEY, KM_PRESS, KM_ALT, 0);
-	kmi = WM_keymap_add_item(keymap, "OBJECT_OT_hide_view_set", HKEY, KM_PRESS, 0, 0);
-	RNA_boolean_set(kmi->ptr, "unselected", false);
-
-	kmi = WM_keymap_add_item(keymap, "OBJECT_OT_hide_view_set", HKEY, KM_PRESS, KM_SHIFT, 0);
-	RNA_boolean_set(kmi->ptr, "unselected", true);
-
-	/* same as above but for rendering */
-	WM_keymap_add_item(keymap, "OBJECT_OT_hide_render_clear", HKEY, KM_PRESS, KM_ALT | KM_CTRL, 0);
-	WM_keymap_add_item(keymap, "OBJECT_OT_hide_render_set", HKEY, KM_PRESS, KM_CTRL, 0);
-
-	/* conflicts, removing */
-#if 0
-	kmi = WM_keymap_add_item(keymap, "OBJECT_OT_hide_render_set", HKEY, KM_PRESS, KM_SHIFT | KM_CTRL, 0)
-	      RNA_boolean_set(kmi->ptr, "unselected", true);
-#endif
-
-	WM_keymap_add_item(keymap, "OBJECT_OT_move_to_layer", MKEY, KM_PRESS, 0, 0);
-	
 	kmi = WM_keymap_add_item(keymap, "OBJECT_OT_delete", XKEY, KM_PRESS, 0, 0);
 	RNA_boolean_set(kmi->ptr, "use_global", false);
 
diff --git a/source/blender/editors/object/object_relations.c b/source/blender/editors/object/object_relations.c
index b5fbe4ba586..c79c702837a 100644
--- a/source/blender/editors/object/object_relations.c
+++ b/source/blender/editors/object/object_relations.c
@@ -63,6 +63,7 @@
 #include "BKE_animsys.h"
 #include "BKE_armature.h"
 #include "BKE_camera.h"
+#include "BKE_collection.h"
 #include "BKE_context.h"
 #include "BKE_constraint.h"
 #include "BKE_curve.h"
@@ -74,6 +75,7 @@
 #include "BKE_fcurve.h"
 #include "BKE_lamp.h"
 #include "BKE_lattice.h"
+#include "BKE_layer.h"
 #include "BKE_library.h"
 #include "BKE_library_query.h"
 #include "BKE_library_remap.h"
@@ -331,6 +333,7 @@ static int make_proxy_exec(bContext *C, wmOperator *op)
 	Object *ob, *gob = ED_object_active_context(C);
 	GroupObject *go;
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 
 	if (gob->dup_group != NULL) {
 		go = BLI_findlink(&gob->dup_group->gobject, RNA_enum_get(op->ptr, "object"));
@@ -343,13 +346,13 @@ static int make_proxy_exec(bContext *C, wmOperator *op)
 
 	if (ob) {
 		Object *newob;
-		Base *newbase, *oldbase = BASACT;
+		BaseLegacy *newbase, *oldbase = BASACT;
 		char name[MAX_ID_NAME + 4];
 
 		BLI_snprintf(name, sizeof(name), "%s_proxy", ((ID *)(gob ? gob : ob))->name + 2);
 
 		/* Add new object for the proxy */
-		newob = BKE_object_add(bmain, scene, OB_EMPTY, name);
+		newob = BKE_object_add(bmain, scene, sl, OB_EMPTY, name);
 
 		/* set layers OK */
 		newbase = BASACT;    /* BKE_object_add sets active... */
@@ -1305,119 +1308,6 @@ void OBJECT_OT_track_set(wmOperatorType *ot)
 	ot->prop = RNA_def_enum(ot->srna, "type", prop_make_track_types, 0, "Type", "");
 }
 
-/************************** Move to Layer Operator *****************************/
-
-static unsigned int move_to_layer_init(bContext *C, wmOperator *op)
-{
-	int values[20], a;
-	unsigned int lay = 0;
-
-	if (!RNA_struct_property_is_set(op->ptr, "layers")) {
-		/* note: layers are set in bases, library objects work for this */
-		CTX_DATA_BEGIN (C, Base *, base, selected_bases)
-		{
-			lay |= base->lay;
-		}
-		CTX_DATA_END;
-
-		for (a = 0; a < 20; a++)
-			values[a] = (lay & (1 << a)) != 0;
-
-		RNA_boolean_set_array(op->ptr, "layers", values);
-	}
-	else {
-		RNA_boolean_get_array(op->ptr, "layers", values);
-
-		for (a = 0; a < 20; a++)
-			if (values[a])
-				lay |= (1 << a);
-	}
-
-	return lay;
-}
-
-static int move_to_layer_invoke(bContext *C, wmOperator *op, const wmEvent *event)
-{
-	View3D *v3d = CTX_wm_view3d(C);
-	if (v3d && v3d->localvd) {
-		return WM_operator_confirm_message(C, op, "Move out of Local View");
-	}
-	else {
-		move_to_layer_init(C, op);
-		return WM_operator_props_popup(C, op, event);
-	}
-}
-
-static int move_to_layer_exec(bContext *C, wmOperator *op)
-{
-	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
-	View3D *v3d = CTX_wm_view3d(C);
-	unsigned int lay, local;
-	/* bool is_lamp = false; */ /* UNUSED */
-
-	lay = move_to_layer_init(C, op);
-	lay &= 0xFFFFFF;
-
-	if (lay == 0) return OPERATOR_CANCELLED;
-
-	if (v3d && v3d->localvd) {
-		/* now we can move out of localview. */
-		/* note: layers are set in bases, library objects work for this */
-		CTX_DATA_BEGIN (C, Base *, base, selected_bases)
-		{
-			lay = base->lay & ~v3d->lay;
-			base->lay = lay;
-			base->object->lay = lay;
-			base->object->flag &= ~SELECT;
-			base->flag &= ~SELECT;
-			/* if (base->object->type == OB_LAMP) is_lamp = true; */
-		}
-		CTX_DATA_END;
-	}
-	else {
-		/* normal non localview operation */
-		/* note: layers are set in bases, library objects work for this */
-		CTX_DATA_BEGIN (C, Base *, base, selected_bases)
-		{
-			/* upper byte is used for local view */
-			local = base->lay & 0xFF000000;
-			base->lay = lay + local;
-			base->object->lay = base->lay;
-			/* if (base->object->type == OB_LAMP) is_lamp = true; */
-		}
-		CTX_DATA_END;
-	}
-
-	/* warning, active object may be hidden now */
-
-	WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, scene);
-	WM_event_add_notifier(C, NC_SCENE | ND_LAYER_CONTENT, scene);
-
-	DAG_relations_tag_update(bmain);
-
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_move_to_layer(wmOperatorType *ot)
-{
-	/* identifiers */
-	ot->name = "Move to Layer";
-	ot->description = "Move the object to different layers";
-	ot->idname = "OBJECT_OT_move_to_layer";
-
-	/* api callbacks */
-	ot->invoke = move_to_layer_invoke;
-	ot->exec = move_to_layer_exec;
-	ot->poll = ED_operator_objectmode;
-
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-
-	/* properties */
-	RNA_def_boolean_layer_member(ot->srna, "layers", 20, NULL, "Layer", "");
-}
-
 /************************** Link to Scene Operator *****************************/
 
 #if 0
@@ -1440,20 +1330,6 @@ static void link_to_scene(Main *UNUSED(bmain), unsigned short UNUSED(nr))
 }
 #endif
 
-Base *ED_object_scene_link(Scene *scene, Object *ob)
-{
-	Base *base;
-
-	if (BKE_scene_base_find(scene, ob)) {
-		return NULL;
-	}
-
-	base = BKE_scene_base_add(scene, ob);
-	id_us_plus(&ob->id);
-
-	return base;
-}
-
 static int make_links_scene_exec(bContext *C, wmOperator *op)
 {
 	Scene *scene_to = BLI_findlink(&CTX_data_main(C)->scene, RNA_enum_get(op->ptr, "scene"));
@@ -1473,9 +1349,10 @@ static int make_links_scene_exec(bContext *C, wmOperator *op)
 		return OPERATOR_CANCELLED;
 	}
 
+	SceneCollection *sc_to = BKE_collection_master(scene_to);
 	CTX_DATA_BEGIN (C, Base *, base, selected_bases)
 	{
-		ED_object_scene_link(scene_to, base->object);
+		BKE_collection_object_add(scene_to, sc_to, base->object);
 	}
 	CTX_DATA_END;
 
@@ -1531,7 +1408,6 @@ static bool allow_make_links_data(const int type, Object *ob_src, Object *ob_dst
 static int make_links_data_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
-	Scene *scene = CTX_data_scene(C);
 	const int type = RNA_enum_get(op->ptr, "type");
 	Object *ob_src;
 	ID *obdata_id;
@@ -1594,12 +1470,12 @@ static int make_links_data_exec(bContext *C, wmOperator *op)
 						LinkNode *group_node;
 
 						/* first clear groups */
-						BKE_object_groups_clear(scene, base_dst, ob_dst);
+						BKE_object_groups_clear(ob_dst);
 
 						/* now add in the groups from the link nodes */
 						for (group_node = ob_groups; group_node; group_node = group_node->next) {
 							if (ob_dst->dup_group != group_node->link) {
-								BKE_group_object_add(group_node->link, ob_dst, scene, base_dst);
+								BKE_group_object_add(group_node->link, ob_dst);
 							}
 							else {
 								is_cycle = true;
@@ -1732,48 +1608,82 @@ void OBJECT_OT_make_links_data(wmOperatorType *ot)
 
 /**************************** Make Single User ********************************/
 
+static Object *single_object_users_object(Main *bmain, Scene *scene, Object *ob, const bool copy_groups)
+{
+	if (!ID_IS_LINKED_DATABLOCK(ob) && ob->id.us > 1) {
+		/* base gets copy of object */
+		Object *obn = ID_NEW_SET(ob, BKE_object_copy(bmain, ob));
+
+		if (copy_groups) {
+			if (ob->flag & OB_FROMGROUP) {
+				obn->flag |= OB_FROMGROUP;
+			}
+		}
+		else {
+			/* copy already clears */
+		}
+		/* remap gpencil parenting */
+
+		if (scene->gpd) {
+			bGPdata *gpd = scene->gpd;
+			for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
+				if (gpl->parent == ob) {
+					gpl->parent = obn;
+				}
+			}
+		}
+
+		id_us_min(&ob->id);
+		return obn;
+	}
+	return NULL;
+}
+
+static void libblock_relink_scene_collection(SceneCollection *sc)
+{
+	for (LinkData *link = sc->objects.first; link; link = link->next) {
+		BKE_libblock_relink_to_newid(link->data);
+	}
+
+	for (SceneCollection *nsc = sc->scene_collections.first; nsc; nsc = nsc->next) {
+		libblock_relink_scene_collection(nsc);
+	}
+}
+
+static void single_object_users_scene_collection(Main *bmain, Scene *scene, SceneCollection *sc, const int flag, const bool copy_groups)
+{
+	for (LinkData *link = sc->objects.first; link; link = link->next) {
+		Object *ob = link->data;
+		/* an object may be in more than one collection */
+		if ((ob->id.newid == NULL) && ((ob->flag & flag) == flag)) {
+			link->data = single_object_users_object(bmain, scene, link->data, copy_groups);
+		}
+	}
+
+	/* we reset filter objects because they should be regenerated after this */
+	BLI_freelistN(&sc->filter_objects);
+
+	for (SceneCollection *nsc = sc->scene_collections.first; nsc; nsc = nsc->next) {
+		single_object_users_scene_collection(bmain, scene, nsc, flag, copy_groups);
+	}
+}
+
 /* Warning, sets ID->newid pointers of objects and groups, but does not clear them. */
 static void single_object_users(Main *bmain, Scene *scene, View3D *v3d, const int flag, const bool copy_groups)
 {
-	Base *base;
-	Object *ob, *obn;
 	Group *group, *groupn;
 	GroupObject *go;
 
 	clear_sca_new_poins();  /* BGE logic */
 
-	/* duplicate (must set newid) */
-	for (base = FIRSTBASE; base; base = base->next) {
-		ob = base->object;
-
-		if ((base->flag & flag) == flag) {
-			if (!ID_IS_LINKED_DATABLOCK(ob) && ob->id.us > 1) {
-				/* base gets copy of object */
-				base->object = obn = ID_NEW_SET(ob, BKE_object_copy(bmain, ob));
-
-				if (copy_groups) {
-					if (ob->flag & OB_FROMGROUP) {
-						obn->flag |= OB_FROMGROUP;
-					}
-				}
-				else {
-					/* copy already clears */
-				}
-				/* remap gpencil parenting */
-
-				if (scene->gpd) {
-					bGPdata *gpd = scene->gpd;
-					for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
-						if (gpl->parent == ob) {
-							gpl->parent = obn;
-						}
-					}
-				}
-
-				base->flag = obn->flag;
+	/* duplicate all the objects of the scene */
+	SceneCollection *msc = BKE_collection_master(scene);
+	single_object_users_scene_collection(bmain, scene, msc, flag, copy_groups);
 
-				id_us_min(&ob->id);
-			}
+	/* loop over SceneLayers and assign the pointers accordingly */
+	for (SceneLayer *sl = scene->render_layers.first; sl; sl = sl->next) {
+		for (Base *base = sl->object_bases.first; base; base = base->next) {
+			ID_NEW_REMAP(base->object);
 		}
 	}
 
@@ -1806,27 +1716,29 @@ static void single_object_users(Main *bmain, Scene *scene, View3D *v3d, const in
 	if (v3d) ID_NEW_REMAP(v3d->camera);
 
 	/* object and group pointers */
-	for (base = FIRSTBASE; base; base = base->next) {
-		BKE_libblock_relink_to_newid(&base->object->id);
-	}
+	libblock_relink_scene_collection(msc);
 
 	set_sca_new_poins();
+
+	/* TODO redo filter */
+	TODO_LAYER_SYNC_FILTER
 }
 
 /* not an especially efficient function, only added so the single user
  * button can be functional.*/
 void ED_object_single_user(Main *bmain, Scene *scene, Object *ob)
 {
-	Base *base;
-	const bool copy_groups = false;
-
-	for (base = FIRSTBASE; base; base = base->next) {
-		if (base->object == ob) base->flag |=  OB_DONE;
-		else base->flag &= ~OB_DONE;
+	Object *ob_iter;
+	FOREACH_SCENE_OBJECT(scene, ob_iter)
+	{
+		ob_iter->flag &= ~OB_DONE;
 	}
+	FOREACH_SCENE_OBJECT_END
 
-	single_object_users(bmain, scene, NULL, OB_DONE, copy_groups);
+	/* tag only the one object */
+	ob->flag |= OB_DONE;
 
+	single_object_users(bmain, scene, NULL, OB_DONE, false);
 	BKE_main_id_clear_newpoins(bmain);
 }
 
@@ -1857,15 +1769,17 @@ static void single_obdata_users(Main *bmain, Scene *scene, const int flag)
 	Lamp *la;
 	Curve *cu;
 	/* Camera *cam; */
-	Base *base;
+	BaseLegacy *base;
 	Mesh *me;
 	Lattice *lat;
 	ID *id;
 	int a;
 
+	TODO_LAYER; /* need to use scene->collection base instead of scene->bases */
+
 	for (base = FIRSTBASE; base; base = base->next) {
 		ob = base->object;
-		if (!ID_IS_LINKED_DATABLOCK(ob) && (base->flag & flag) == flag) {
+		if (!ID_IS_LINKED_DATABLOCK(ob) && (base->flag_legacy & flag) == flag) {
 			id = ob->data;
 
 			if (id && id->us > 1 && !ID_IS_LINKED_DATABLOCK(id)) {
@@ -1939,31 +1853,27 @@ static void single_obdata_users(Main *bmain, Scene *scene, const int flag)
 	}
 }
 
-static void single_object_action_users(Scene *scene, const int flag)
+static void single_object_action_users(Scene *scene, SceneLayer *sl, const int flag)
 {
 	Object *ob;
-	Base *base;
 
-	for (base = FIRSTBASE; base; base = base->next) {
-		ob = base->object;
-		if (!ID_IS_LINKED_DATABLOCK(ob) && (flag == 0 || (base->flag & SELECT)) ) {
+	FOREACH_OBJECT_FLAG(scene, sl, flag, ob)
+	    if (!ID_IS_LINKED_DATABLOCK(ob)) {
 			DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
 			BKE_animdata_copy_id_action(&ob->id, false);
 		}
-	}
+	FOREACH_OBJECT_FLAG_END
 }
 
-static void single_mat_users(Main *bmain, Scene *scene, const int flag, const bool do_textures)
+static void single_mat_users(Main *bmain, Scene *scene, SceneLayer *sl, const int flag, const bool do_textures)
 {
-	Object *ob;
-	Base *base;
 	Material *ma, *man;
 	Tex *tex;
 	int a, b;
 
-	for (base = FIRSTBASE; base; base = base->next) {
-		ob = base->object;
-		if (!ID_IS_LINKED_DATABLOCK(ob) && (flag == 0 || (base->flag & SELECT)) ) {
+	Object *ob;
+	FOREACH_OBJECT_FLAG(scene, sl, flag, ob)
+	    if (!ID_IS_LINKED_DATABLOCK(ob)) {
 			for (a = 1; a <= ob->totcol; a++) {
 				ma = give_current_material(ob, a);
 				if (ma) {
@@ -1992,7 +1902,7 @@ static void single_mat_users(Main *bmain, Scene *scene, const int flag, const bo
 				}
 			}
 		}
-	}
+	FOREACH_OBJECT_FLAG_END
 }
 
 static void do_single_tex_user(Main *bmain, Tex **from)
@@ -2096,7 +2006,7 @@ void ED_object_single_users(Main *bmain, Scene *scene, const bool full, const bo
 
 	if (full) {
 		single_obdata_users(bmain, scene, 0);
-		single_object_action_users(scene, 0);
+		single_object_action_users(scene, NULL, 0);
 		single_mat_users_expand(bmain);
 		single_tex_users_expand(bmain);
 	}
@@ -2194,13 +2104,13 @@ static bool make_local_all__instance_indirect_unused(Main *bmain, Scene *scene)
 
 	for (ob = bmain->object.first; ob; ob = ob->id.next) {
 		if (ID_IS_LINKED_DATABLOCK(ob) && (ob->id.us == 0)) {
-			Base *base;
+			BaseLegacy *base;
 
 			id_us_plus(&ob->id);
 
 			base = BKE_scene_base_add(scene, ob);
-			base->flag |= SELECT;
-			base->object->flag = base->flag;
+			base->flag_legacy |= SELECT;
+			BKE_scene_base_flag_sync_from_base(base);
 			DAG_id_tag_update(&ob->id, OB_RECALC_OB | OB_RECALC_DATA | OB_RECALC_TIME);
 
 			changed = true;
@@ -2366,13 +2276,20 @@ static int make_single_user_exec(bContext *C, wmOperator *op)
 {
 	Main *bmain = CTX_data_main(C);
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	View3D *v3d = CTX_wm_view3d(C); /* ok if this is NULL */
 	const int flag = (RNA_enum_get(op->ptr, "type") == MAKE_SINGLE_USER_SELECTED) ? SELECT : 0;
 	const bool copy_groups = false;
 	bool update_deps = false;
 
 	if (RNA_boolean_get(op->ptr, "object")) {
-		single_object_users(bmain, scene, v3d, flag, copy_groups);
+		if (flag == SELECT) {
+			BKE_scene_layer_selected_objects_tag(sl, OB_DONE);
+			single_object_users(bmain, scene, v3d, OB_DONE, copy_groups);
+		}
+		else {
+			single_object_users(bmain, scene, v3d, 0, copy_groups);
+		}
 
 		/* needed since object relationships may have changed */
 		update_deps = true;
@@ -2383,7 +2300,7 @@ static int make_single_user_exec(bContext *C, wmOperator *op)
 	}
 
 	if (RNA_boolean_get(op->ptr, "material")) {
-		single_mat_users(bmain, scene, flag, RNA_boolean_get(op->ptr, "texture"));
+		single_mat_users(bmain, scene, sl, flag, RNA_boolean_get(op->ptr, "texture"));
 	}
 
 #if 0 /* can't do this separate from materials */
@@ -2391,7 +2308,7 @@ static int make_single_user_exec(bContext *C, wmOperator *op)
 		single_mat_users(scene, flag, true);
 #endif
 	if (RNA_boolean_get(op->ptr, "animation")) {
-		single_object_action_users(scene, flag);
+		single_object_action_users(scene, sl, flag);
 	}
 
 	BKE_main_id_clear_newpoins(bmain);
@@ -2438,7 +2355,7 @@ void OBJECT_OT_make_single_user(wmOperatorType *ot)
 
 static int drop_named_material_invoke(bContext *C, wmOperator *op, const wmEvent *event)
 {
-	Base *base = ED_view3d_give_base_under_cursor(C, event->mval);
+	BaseLegacy *base = ED_view3d_give_base_under_cursor(C, event->mval);
 	Material *ma;
 	char name[MAX_ID_NAME - 2];
 
diff --git a/source/blender/editors/object/object_select.c b/source/blender/editors/object/object_select.c
index b5131df3eaa..961278c2c83 100644
--- a/source/blender/editors/object/object_select.c
+++ b/source/blender/editors/object/object_select.c
@@ -52,6 +52,7 @@
 
 #include "BKE_context.h"
 #include "BKE_group.h"
+#include "BKE_layer.h"
 #include "BKE_main.h"
 #include "BKE_material.h"
 #include "BKE_particle.h"
@@ -86,22 +87,22 @@
 /* Note: send a NC_SCENE|ND_OB_SELECT notifier yourself! (or 
  * or a NC_SCENE|ND_OB_VISIBLE in case of visibility toggling */
 
-void ED_base_object_select(Base *base, short mode)
+void ED_base_object_select(BaseLegacy *base, short mode)
 {
 	if (base) {
 		if (mode == BA_SELECT) {
 			if (!(base->object->restrictflag & OB_RESTRICT_SELECT))
-				base->flag |= SELECT;
+				base->flag_legacy |= SELECT;
 		}
 		else if (mode == BA_DESELECT) {
-			base->flag &= ~SELECT;
+			base->flag_legacy &= ~SELECT;
 		}
-		base->object->flag = base->flag;
+		BKE_scene_base_flag_sync_from_base(base);
 	}
 }
 
 /* also to set active NULL */
-void ED_base_object_activate(bContext *C, Base *base)
+void ED_base_object_activate(bContext *C, BaseLegacy *base)
 {
 	Scene *scene = CTX_data_scene(C);
 	
@@ -119,6 +120,33 @@ void ED_base_object_activate(bContext *C, Base *base)
 		WM_event_add_notifier(C, NC_SCENE | ND_OB_ACTIVE, NULL);
 }
 
+void ED_object_base_select(Base *base, short mode)
+{
+	if (base) {
+		if (mode == BA_SELECT) {
+			if ((base->flag & BASE_SELECTABLED) != 0) {
+				base->flag |= BASE_SELECTED;
+			}
+		}
+		else if (mode == BA_DESELECT) {
+			base->flag &= ~BASE_SELECTED;
+		}
+	}
+}
+
+void ED_object_base_activate(bContext *C, Base *base)
+{
+	SceneLayer *sl = CTX_data_scene_layer(C);
+	sl->basact = base;
+
+	if (base) {
+		WM_event_add_notifier(C, NC_SCENE | ND_OB_ACTIVE, sl);
+	}
+	else {
+		WM_event_add_notifier(C, NC_SCENE | ND_OB_ACTIVE, NULL);
+	}
+}
+
 /********************** Selection Operators **********************/
 
 static int objects_selectable_poll(bContext *C)
@@ -147,7 +175,7 @@ static int object_select_by_type_exec(bContext *C, wmOperator *op)
 	if (extend == 0) {
 		CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 		{
-			ED_base_object_select(base, BA_DESELECT);
+			ED_object_base_select(base, BA_DESELECT);
 		}
 		CTX_DATA_END;
 	}
@@ -155,7 +183,7 @@ static int object_select_by_type_exec(bContext *C, wmOperator *op)
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
 		if (base->object->type == obtype) {
-			ED_base_object_select(base, BA_SELECT);
+			ED_object_base_select(base, BA_SELECT);
 		}
 	}
 	CTX_DATA_END;
@@ -210,38 +238,15 @@ static EnumPropertyItem prop_select_linked_types[] = {
 	{0, NULL, 0, NULL, NULL}
 };
 
-// XXX old animation system
-#if 0
-static int object_select_all_by_ipo(bContext *C, Ipo *ipo)
-{
-	bool changed = false;
-
-	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
-	{
-		if (base->object->ipo == ipo) {
-			base->flag |= SELECT;
-			base->object->flag = base->flag;
-
-			changed = true;
-		}
-	}
-	CTX_DATA_END;
-
-	return changed;
-}
-#endif
-
 static bool object_select_all_by_obdata(bContext *C, void *obdata)
 {
 	bool changed = false;
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if ((base->flag & SELECT) == 0) {
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
 			if (base->object->data == obdata) {
-				base->flag |= SELECT;
-				base->object->flag = base->flag;
-
+				ED_object_base_select(base, BA_SELECT);
 				changed = true;
 			}
 		}
@@ -257,7 +262,7 @@ static bool object_select_all_by_material_texture(bContext *C, int use_texture,
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if ((base->flag & SELECT) == 0) {
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
 			Object *ob = base->object;
 			Material *mat1;
 			int a, b;
@@ -267,7 +272,7 @@ static bool object_select_all_by_material_texture(bContext *C, int use_texture,
 
 				if (!use_texture) {
 					if (mat1 == mat) {
-						base->flag |= SELECT;
+						ED_object_base_select(base, BA_SELECT);
 						changed = true;
 					}
 				}
@@ -275,7 +280,7 @@ static bool object_select_all_by_material_texture(bContext *C, int use_texture,
 					for (b = 0; b < MAX_MTEX; b++) {
 						if (mat1->mtex[b]) {
 							if (tex == mat1->mtex[b]->tex) {
-								base->flag |= SELECT;
+								ED_object_base_select(base, BA_SELECT);
 								changed = true;
 								break;
 							}
@@ -283,8 +288,6 @@ static bool object_select_all_by_material_texture(bContext *C, int use_texture,
 					}
 				}
 			}
-
-			base->object->flag = base->flag;
 		}
 	}
 	CTX_DATA_END;
@@ -299,12 +302,10 @@ static bool object_select_all_by_dup_group(bContext *C, Object *ob)
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if ((base->flag & SELECT) == 0) {
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
 			Group *dup_group_other = (base->object->transflag & OB_DUPLIGROUP) ? base->object->dup_group : NULL;
 			if (dup_group == dup_group_other) {
-				base->flag |= SELECT;
-				base->object->flag = base->flag;
-
+				ED_object_base_select(base, BA_SELECT);
 				changed = true;
 			}
 		}
@@ -321,23 +322,21 @@ static bool object_select_all_by_particle(bContext *C, Object *ob)
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if ((base->flag & SELECT) == 0) {
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
 			/* loop through other particles*/
 			ParticleSystem *psys;
 			
 			for (psys = base->object->particlesystem.first; psys; psys = psys->next) {
 				if (psys->part == psys_act->part) {
-					base->flag |= SELECT;
+					ED_object_base_select(base, BA_SELECT);
 					changed = true;
 					break;
 				}
 
-				if (base->flag & SELECT) {
+				if (base->flag & BASE_SELECTED) {
 					break;
 				}
 			}
-
-			base->object->flag = base->flag;
 		}
 	}
 	CTX_DATA_END;
@@ -351,11 +350,9 @@ static bool object_select_all_by_library(bContext *C, Library *lib)
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if ((base->flag & SELECT) == 0) {
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
 			if (lib == base->object->id.lib) {
-				base->flag |= SELECT;
-				base->object->flag = base->flag;
-
+				ED_object_base_select(base, BA_SELECT);
 				changed = true;
 			}
 		}
@@ -371,11 +368,9 @@ static bool object_select_all_by_library_obdata(bContext *C, Library *lib)
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if ((base->flag & SELECT) == 0) {
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
 			if (base->object->data && lib == ((ID *)base->object->data)->lib) {
-				base->flag |= SELECT;
-				base->object->flag = base->flag;
-
+				ED_object_base_select(base, BA_SELECT);
 				changed = true;
 			}
 		}
@@ -417,7 +412,7 @@ static int object_select_linked_exec(bContext *C, wmOperator *op)
 	if (extend == 0) {
 		CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 		{
-			ED_base_object_select(base, BA_DESELECT);
+			ED_object_base_select(base, BA_DESELECT);
 		}
 		CTX_DATA_END;
 	}
@@ -517,7 +512,7 @@ enum {
 	OBJECT_GRPSEL_PARENT             =  2,
 	OBJECT_GRPSEL_SIBLINGS           =  3,
 	OBJECT_GRPSEL_TYPE               =  4,
-	OBJECT_GRPSEL_LAYER              =  5,
+	/*OBJECT_GRPSEL_LAYER              =  5,*/
 	OBJECT_GRPSEL_GROUP              =  6,
 	OBJECT_GRPSEL_HOOK               =  7,
 	OBJECT_GRPSEL_PASS               =  8,
@@ -533,7 +528,6 @@ static EnumPropertyItem prop_select_grouped_types[] = {
 	{OBJECT_GRPSEL_PARENT, "PARENT", 0, "Parent", ""},
 	{OBJECT_GRPSEL_SIBLINGS, "SIBLINGS", 0, "Siblings", "Shared Parent"},
 	{OBJECT_GRPSEL_TYPE, "TYPE", 0, "Type", "Shared object type"},
-	{OBJECT_GRPSEL_LAYER, "LAYER", 0, "Layer", "Shared layers"},
 	{OBJECT_GRPSEL_GROUP, "GROUP", 0, "Group", "Shared group"},
 	{OBJECT_GRPSEL_HOOK, "HOOK", 0, "Hook", ""},
 	{OBJECT_GRPSEL_PASS, "PASS", 0, "Pass", "Render pass Index"},
@@ -551,13 +545,14 @@ static bool select_grouped_children(bContext *C, Object *ob, const bool recursiv
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
 		if (ob == base->object->parent) {
-			if (!(base->flag & SELECT)) {
-				ED_base_object_select(base, BA_SELECT);
+			if ((base->flag & BASE_SELECTED) == 0) {
+				ED_object_base_select(base, BA_SELECT);
 				changed = true;
 			}
 
-			if (recursive)
+			if (recursive) {
 				changed |= select_grouped_children(C, base->object, 1);
+			}
 		}
 	}
 	CTX_DATA_END;
@@ -566,20 +561,21 @@ static bool select_grouped_children(bContext *C, Object *ob, const bool recursiv
 
 static bool select_grouped_parent(bContext *C) /* Makes parent active and de-selected OBACT */
 {
-	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	View3D *v3d = CTX_wm_view3d(C);
-
-	bool changed = false;
 	Base *baspar, *basact = CTX_data_active_base(C);
+	bool changed = false;
 
-	if (!basact || !(basact->object->parent)) return 0;  /* we know OBACT is valid */
+	if (!basact || !(basact->object->parent)) {
+		return 0;  /* we know OBACT is valid */
+	}
 
-	baspar = BKE_scene_base_find(scene, basact->object->parent);
+	baspar = BKE_scene_layer_base_find(sl, basact->object->parent);
 
 	/* can be NULL if parent in other scene */
 	if (baspar && BASE_SELECTABLE(v3d, baspar)) {
-		ED_base_object_select(baspar, BA_SELECT);
-		ED_base_object_activate(C, baspar);
+		ED_object_base_select(baspar, BA_SELECT);
+		ED_object_base_activate(C, baspar);
 		changed = true;
 	}
 	return changed;
@@ -608,9 +604,11 @@ static bool select_grouped_group(bContext *C, Object *ob)  /* Select objects in
 		group = ob_groups[0];
 		CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 		{
-			if (!(base->flag & SELECT) && BKE_group_object_exists(group, base->object)) {
-				ED_base_object_select(base, BA_SELECT);
-				changed = true;
+			if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
+				if (BKE_group_object_exists(group, base->object)) {
+					ED_object_base_select(base, BA_SELECT);
+					changed = true;
+				}
 			}
 		}
 		CTX_DATA_END;
@@ -636,7 +634,7 @@ static bool select_grouped_object_hooks(bContext *C, Object *ob)
 	View3D *v3d = CTX_wm_view3d(C);
 
 	bool changed = false;
-	Base *base;
+	BaseLegacy *base;
 	ModifierData *md;
 	HookModifierData *hmd;
 
@@ -663,8 +661,8 @@ static bool select_grouped_siblings(bContext *C, Object *ob)
 
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
-		if ((base->object->parent == ob->parent) && !(base->flag & SELECT)) {
-			ED_base_object_select(base, BA_SELECT);
+		if ((base->object->parent == ob->parent) && ((base->flag & BASE_SELECTED) == 0)) {
+			ED_object_base_select(base, BA_SELECT);
 			changed = true;
 		}
 	}
@@ -681,8 +679,8 @@ static bool select_grouped_lamptype(bContext *C, Object *ob)
 	{
 		if (base->object->type == OB_LAMP) {
 			Lamp *la_test = base->object->data;
-			if ((la->type == la_test->type) && !(base->flag & SELECT)) {
-				ED_base_object_select(base, BA_SELECT);
+			if ((la->type == la_test->type) && ((base->flag & BASE_SELECTED) == 0)) {
+				ED_object_base_select(base, BA_SELECT);
 				changed = true;
 			}
 		}
@@ -696,23 +694,8 @@ static bool select_grouped_type(bContext *C, Object *ob)
 
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
-		if ((base->object->type == ob->type) && !(base->flag & SELECT)) {
-			ED_base_object_select(base, BA_SELECT);
-			changed = true;
-		}
-	}
-	CTX_DATA_END;
-	return changed;
-}
-
-static bool select_grouped_layer(bContext *C, Object *ob)
-{
-	bool changed = false;
-
-	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
-	{
-		if ((base->lay & ob->lay) && !(base->flag & SELECT)) {
-			ED_base_object_select(base, BA_SELECT);
+		if ((base->object->type == ob->type) && ((base->flag & BASE_SELECTED) == 0)) {
+			ED_object_base_select(base, BA_SELECT);
 			changed = true;
 		}
 	}
@@ -726,8 +709,8 @@ static bool select_grouped_index_object(bContext *C, Object *ob)
 
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
-		if ((base->object->index == ob->index) && !(base->flag & SELECT)) {
-			ED_base_object_select(base, BA_SELECT);
+		if ((base->object->index == ob->index) && ((base->flag & BASE_SELECTED) == 0)) {
+			ED_object_base_select(base, BA_SELECT);
 			changed = true;
 		}
 	}
@@ -741,8 +724,8 @@ static bool select_grouped_color(bContext *C, Object *ob)
 
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
-		if (!(base->flag & SELECT) && (compare_v3v3(base->object->col, ob->col, 0.005f))) {
-			ED_base_object_select(base, BA_SELECT);
+		if (((base->flag & BASE_SELECTED) == 0) && (compare_v3v3(base->object->col, ob->col, 0.005f))) {
+			ED_object_base_select(base, BA_SELECT);
 			changed = true;
 		}
 	}
@@ -768,8 +751,8 @@ static bool select_grouped_gameprops(bContext *C, Object *ob)
 
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
-		if (!(base->flag & SELECT) && (objects_share_gameprop(base->object, ob))) {
-			ED_base_object_select(base, BA_SELECT);
+		if (((base->flag & BASE_SELECTED) == 0) && (objects_share_gameprop(base->object, ob))) {
+			ED_object_base_select(base, BA_SELECT);
 			changed = true;
 		}
 	}
@@ -807,7 +790,7 @@ static bool select_grouped_keyingset(bContext *C, Object *UNUSED(ob), ReportList
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
 		/* only check for this object if it isn't selected already, to limit time wasted */
-		if ((base->flag & SELECT) == 0) {
+		if ((base->flag & BASE_SELECTED) == 0) {
 			KS_Path *ksp;
 			
 			/* this is the slow way... we could end up with > 500 items here, 
@@ -816,7 +799,7 @@ static bool select_grouped_keyingset(bContext *C, Object *UNUSED(ob), ReportList
 			for (ksp = ks->paths.first; ksp; ksp = ksp->next) {
 				/* if id matches, select then stop looping (match found) */
 				if (ksp->id == (ID *)base->object) {
-					ED_base_object_select(base, BA_SELECT);
+					ED_object_base_select(base, BA_SELECT);
 					changed = true;
 					break;
 				}
@@ -840,7 +823,7 @@ static int object_select_grouped_exec(bContext *C, wmOperator *op)
 	if (extend == 0) {
 		CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 		{
-			ED_base_object_select(base, BA_DESELECT);
+			ED_object_base_select(base, BA_DESELECT);
 			changed = true;
 		}
 		CTX_DATA_END;
@@ -868,9 +851,6 @@ static int object_select_grouped_exec(bContext *C, wmOperator *op)
 		case OBJECT_GRPSEL_TYPE:
 			changed |= select_grouped_type(C, ob);
 			break;
-		case OBJECT_GRPSEL_LAYER:
-			changed |= select_grouped_layer(C, ob);
-			break;
 		case OBJECT_GRPSEL_GROUP:
 			changed |= select_grouped_group(C, ob);
 			break;
@@ -928,85 +908,6 @@ void OBJECT_OT_select_grouped(wmOperatorType *ot)
 	ot->prop = RNA_def_enum(ot->srna, "type", prop_select_grouped_types, 0, "Type", "");
 }
 
-/************************* Select by Layer **********************/
-enum {
-	OB_SEL_LAYERMATCH_EXACT = 1,
-	OB_SEL_LAYERMATCH_SHARED = 2,
-};
-
-static int object_select_by_layer_exec(bContext *C, wmOperator *op)
-{
-	unsigned int layernum;
-	bool extend;
-	int match;
-	
-	extend = RNA_boolean_get(op->ptr, "extend");
-	layernum = RNA_int_get(op->ptr, "layers");
-	match = RNA_enum_get(op->ptr, "match");
-	
-	if (extend == false) {
-		CTX_DATA_BEGIN (C, Base *, base, visible_bases)
-		{
-			ED_base_object_select(base, BA_DESELECT);
-		}
-		CTX_DATA_END;
-	}
-		
-	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
-	{
-		bool ok = false;
-
-		switch (match) {
-			case OB_SEL_LAYERMATCH_EXACT:
-				/* Mask out bits used for local view, only work on real layer ones, see T45783. */
-				ok = ((base->lay & ((1 << 20) - 1)) == (1 << (layernum - 1)));
-				break;
-			case OB_SEL_LAYERMATCH_SHARED:
-				ok = (base->lay & (1 << (layernum - 1))) != 0;
-				break;
-			default:
-				break;
-		}
-
-		if (ok) {
-			ED_base_object_select(base, BA_SELECT);
-		}
-	}
-	CTX_DATA_END;
-	
-	/* undo? */
-	WM_event_add_notifier(C, NC_SCENE | ND_OB_SELECT, CTX_data_scene(C));
-	
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_select_by_layer(wmOperatorType *ot)
-{
-	static EnumPropertyItem match_items[] = {
-		{OB_SEL_LAYERMATCH_EXACT, "EXACT", 0, "Exact Match", ""},
-		{OB_SEL_LAYERMATCH_SHARED, "SHARED", 0, "Shared Layers", ""},
-		{0, NULL, 0, NULL, NULL}
-	};
-
-	/* identifiers */
-	ot->name = "Select by Layer";
-	ot->description = "Select all visible objects on a layer";
-	ot->idname = "OBJECT_OT_select_by_layer";
-	
-	/* api callbacks */
-	/*ot->invoke = XXX - need a int grid popup*/
-	ot->exec = object_select_by_layer_exec;
-	ot->poll = objects_selectable_poll;
-	
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-	
-	/* properties */
-	RNA_def_enum(ot->srna, "match", match_items, OB_SEL_LAYERMATCH_EXACT, "Match", "");
-	RNA_def_boolean(ot->srna, "extend", false, "Extend", "Extend selection instead of deselecting everything first");
-	RNA_def_int(ot->srna, "layers", 1, 1, 20, "Layer", "", 1, 20);
-}
-
 /**************************** (De)select All ****************************/
 
 static int object_select_all_exec(bContext *C, wmOperator *op)
@@ -1020,7 +921,7 @@ static int object_select_all_exec(bContext *C, wmOperator *op)
 		action = SEL_SELECT;
 		CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 		{
-			if (base->flag & SELECT) {
+			if ((base->flag & BASE_SELECTED) != 0) {
 				action = SEL_DESELECT;
 				break;
 			}
@@ -1032,17 +933,17 @@ static int object_select_all_exec(bContext *C, wmOperator *op)
 	{
 		switch (action) {
 			case SEL_SELECT:
-				ED_base_object_select(base, BA_SELECT);
+			    ED_object_base_select(base, BA_SELECT);
 				break;
 			case SEL_DESELECT:
-				ED_base_object_select(base, BA_DESELECT);
+			    ED_object_base_select(base, BA_DESELECT);
 				break;
 			case SEL_INVERT:
-				if (base->flag & SELECT) {
-					ED_base_object_select(base, BA_DESELECT);
+			    if ((base->flag & BASE_SELECTED) != 0) {
+					ED_object_base_select(base, BA_DESELECT);
 				}
 				else {
-					ED_base_object_select(base, BA_SELECT);
+					ED_object_base_select(base, BA_SELECT);
 				}
 				break;
 		}
@@ -1092,8 +993,11 @@ static int object_select_same_group_exec(bContext *C, wmOperator *op)
 
 	CTX_DATA_BEGIN (C, Base *, base, visible_bases)
 	{
-		if (!(base->flag & SELECT) && BKE_group_object_exists(group, base->object))
-			ED_base_object_select(base, BA_SELECT);
+		if (((base->flag & BASE_SELECTED) == 0) && ((base->flag & BASE_SELECTABLED) != 0)) {
+			if (BKE_group_object_exists(group, base->object)) {
+				ED_object_base_select(base, BA_SELECT);
+			}
+		}
 	}
 	CTX_DATA_END;
 
@@ -1124,6 +1028,7 @@ void OBJECT_OT_select_same_group(wmOperatorType *ot)
 static int object_select_mirror_exec(bContext *C, wmOperator *op)
 {
 	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 	bool extend;
 	
 	extend = RNA_boolean_get(op->ptr, "extend");
@@ -1137,15 +1042,15 @@ static int object_select_mirror_exec(bContext *C, wmOperator *op)
 		if (!STREQ(name_flip, primbase->object->id.name + 2)) {
 			Object *ob = (Object *)BKE_libblock_find_name(ID_OB, name_flip);
 			if (ob) {
-				Base *secbase = BKE_scene_base_find(scene, ob);
+				Base *secbase = BKE_scene_layer_base_find(sl, ob);
 
 				if (secbase) {
-					ED_base_object_select(secbase, BA_SELECT);
+					ED_object_base_select(secbase, BA_SELECT);
 				}
 			}
 		}
 		
-		if (extend == false) ED_base_object_select(primbase, BA_DESELECT);
+		if (extend == false) ED_object_base_select(primbase, BA_DESELECT);
 		
 	}
 	CTX_DATA_END;
@@ -1180,9 +1085,9 @@ void OBJECT_OT_select_mirror(wmOperatorType *ot)
 
 static bool object_select_more_less(bContext *C, const bool select)
 {
-	Scene *scene = CTX_data_scene(C);
+	SceneLayer *sl = CTX_data_scene_layer(C);
 
-	for (Base *base = scene->base.first; base; base = base->next) {
+	for (BaseLegacy *base = sl->object_bases.first; base; base = base->next) {
 		Object *ob = base->object;
 		ob->flag &= ~OB_DONE;
 		ob->id.tag &= ~LIB_TAG_DOIT;
@@ -1223,7 +1128,7 @@ static bool object_select_more_less(bContext *C, const bool select)
 		Base *base = ctx_base->ptr.data;
 		Object *ob = base->object;
 		if ((ob->id.tag & LIB_TAG_DOIT) && ((ob->flag & SELECT) != select_flag)) {
-			ED_base_object_select(base, select_mode);
+			ED_object_base_select(base, select_mode);
 			changed = true;
 		}
 	}
@@ -1305,7 +1210,7 @@ static int object_select_random_exec(bContext *C, wmOperator *op)
 	CTX_DATA_BEGIN (C, Base *, base, selectable_bases)
 	{
 		if (BLI_rng_get_float(rng) < randfac) {
-			ED_base_object_select(base, select);
+			ED_object_base_select(base, select);
 		}
 	}
 	CTX_DATA_END;
diff --git a/source/blender/editors/object/object_vgroup.c b/source/blender/editors/object/object_vgroup.c
index 56f59dca9a1..5454a930485 100644
--- a/source/blender/editors/object/object_vgroup.c
+++ b/source/blender/editors/object/object_vgroup.c
@@ -3296,7 +3296,7 @@ static int vertex_group_copy_to_linked_exec(bContext *C, wmOperator *UNUSED(op))
 {
 	Scene *scene = CTX_data_scene(C);
 	Object *ob = ED_object_context(C);
-	Base *base;
+	BaseLegacy *base;
 	int retval = OPERATOR_CANCELLED;
 
 	for (base = scene->base.first; base; base = base->next) {