Fix #34040: Moving Normal Node with enabled Cycles Material Preview crashes

Issue was caused by couple of circumstances:

- Normal Map node requires tesselated faces to compute tangent space
- All temporary meshes needed for Cycles export were adding to G.main
- Undo pushes would temporary set meshes tessfaces to NULL
- Moving node will cause undo push and tree re-evaluate fr preview

All this leads to threading conflict between preview render and undo
system.

Solved it in  way that all temporary meshes are adding to that exact
Main which was passed to Cycles via BlendData. This required couple
of mechanic changes like adding extra parameter to *_add() functions
and adding some *_ex() functions to make it possible RNA adds objects
to Main passed to new() RNA function.

This was tricky to pass Main to RNA function and IMO that's not so
nice to pass main to function, so ended up with such decision:

- Object.to_mesh() will add temp mesh to G.main
- Added Main.meshes.new_from_object() which does the same as to_mesh,
  but adds temporary mesh to specified Main.

So now all temporary meshes needed for preview render would be added
to preview_main which does not conflict with undo pushes.

Viewport render shall not be an issue because object sync happens from
main thread in this case.

It could be some issues with final render, but that's not so much
likely to happen, so shall be fine.

Thanks to Brecht for review!

45 files changed, 136 insertions, 114 deletions

diff --git a/source/blender/blenkernel/BKE_action.h b/source/blender/blenkernel/BKE_action.h
index 4f54f93a7fc..12c9f6b449f 100644
--- a/source/blender/blenkernel/BKE_action.h
+++ b/source/blender/blenkernel/BKE_action.h
@@ -44,6 +44,7 @@ struct FCurve;
 struct bPose;
 struct bItasc;
 struct bPoseChannel;
+struct Main;
 struct Object;
 struct Scene;
 struct ID;
@@ -56,7 +57,7 @@ extern "C" {
 /* Action Lib Stuff ----------------- */
 
 /* Allocate a new bAction with the given name */
-struct bAction *add_empty_action(const char name[]);
+struct bAction *add_empty_action(struct Main *bmain, const char name[]);
 
 /* Allocate a copy of the given Action and all its data */	
 struct bAction *BKE_action_copy(struct bAction *src);
diff --git a/source/blender/blenkernel/BKE_armature.h b/source/blender/blenkernel/BKE_armature.h
index 765a00b8d4b..fb9e9f4e691 100644
--- a/source/blender/blenkernel/BKE_armature.h
+++ b/source/blender/blenkernel/BKE_armature.h
@@ -73,7 +73,7 @@ typedef struct PoseTree {
 extern "C" {
 #endif
 
-struct bArmature *BKE_armature_add(const char *name);
+struct bArmature *BKE_armature_add(struct Main *bmain, const char *name);
 struct bArmature *BKE_armature_from_object(struct Object *ob);
 void BKE_armature_bonelist_free(struct ListBase *lb);
 void BKE_armature_free(struct bArmature *arm);
diff --git a/source/blender/blenkernel/BKE_brush.h b/source/blender/blenkernel/BKE_brush.h
index 91f0525d4f3..cfae15961d7 100644
--- a/source/blender/blenkernel/BKE_brush.h
+++ b/source/blender/blenkernel/BKE_brush.h
@@ -37,12 +37,13 @@ struct ID;
 struct Brush;
 struct ImBuf;
 struct ImagePool;
+struct Main;
 struct Scene;
 struct wmOperator;
 // enum CurveMappingPreset;
 
 /* datablock functions */
-struct Brush *BKE_brush_add(const char *name);
+struct Brush *BKE_brush_add(struct Main *bmain, const char *name);
 struct Brush *BKE_brush_copy(struct Brush *brush);
 void BKE_brush_make_local(struct Brush *brush);
 void BKE_brush_free(struct Brush *brush);
diff --git a/source/blender/blenkernel/BKE_camera.h b/source/blender/blenkernel/BKE_camera.h
index 2a27934c038..057cd79b9e4 100644
--- a/source/blender/blenkernel/BKE_camera.h
+++ b/source/blender/blenkernel/BKE_camera.h
@@ -39,6 +39,7 @@ extern "C" {
 #include "DNA_vec_types.h"
 
 struct Camera;
+struct Main;
 struct Object;
 struct RegionView3D;
 struct RenderData;
@@ -48,7 +49,7 @@ struct View3D;
 
 /* Camera Datablock */
 
-void *BKE_camera_add(const char *name);
+void *BKE_camera_add(struct Main *bmain, const char *name);
 struct Camera *BKE_camera_copy(struct Camera *cam);
 void BKE_camera_make_local(struct Camera *cam);
 void BKE_camera_free(struct Camera *ca);
diff --git a/source/blender/blenkernel/BKE_curve.h b/source/blender/blenkernel/BKE_curve.h
index 536bbecb79b..358f884f74e 100644
--- a/source/blender/blenkernel/BKE_curve.h
+++ b/source/blender/blenkernel/BKE_curve.h
@@ -39,6 +39,7 @@ struct Curve;
 struct EditNurb;
 struct ListBase;
 struct ListBase;
+struct Main;
 struct Nurb;
 struct Object;
 struct Scene;
@@ -57,7 +58,7 @@ struct Scene;
 void BKE_curve_unlink(struct Curve *cu);
 void BKE_curve_free(struct Curve *cu);
 void BKE_curve_editfont_free(struct Curve *cu);
-struct Curve *BKE_curve_add(const char *name, int type);
+struct Curve *BKE_curve_add(struct Main *bmain, const char *name, int type);
 struct Curve *BKE_curve_copy(struct Curve *cu);
 void BKE_curve_make_local(struct Curve *cu);
 short BKE_curve_type_get(struct Curve *cu);
diff --git a/source/blender/blenkernel/BKE_group.h b/source/blender/blenkernel/BKE_group.h
index 3e9803a908b..8c36a73a088 100644
--- a/source/blender/blenkernel/BKE_group.h
+++ b/source/blender/blenkernel/BKE_group.h
@@ -36,13 +36,14 @@
 struct Base;
 struct Group;
 struct GroupObject;
+struct Main;
 struct Object;
 struct bAction;
 struct Scene;
 
 void        BKE_group_free(struct Group *group);
 void        BKE_group_unlink(struct Group *group);
-struct Group *add_group(const char *name);
+struct Group *add_group(struct Main *bmain, const char *name);
 struct Group *BKE_group_copy(struct Group *group);
 int         add_to_group(struct Group *group, struct Object *ob, struct Scene *scene, struct Base *base);
 int         rem_from_group(struct Group *group, struct Object *ob, struct Scene *scene, struct Base *base);
diff --git a/source/blender/blenkernel/BKE_image.h b/source/blender/blenkernel/BKE_image.h
index bfee5e820c3..f098defb907 100644
--- a/source/blender/blenkernel/BKE_image.h
+++ b/source/blender/blenkernel/BKE_image.h
@@ -153,12 +153,12 @@ struct ImBuf *BKE_image_pool_acquire_ibuf(struct Image *ima, struct ImageUser *i
 void BKE_image_pool_release_ibuf(struct Image *ima, struct ImBuf *ibuf, struct ImagePool *pool);
 
 /* returns a new image or NULL if it can't load */
-struct Image *BKE_image_load(const char *filepath);
+struct Image *BKE_image_load(struct Main *bmain, const char *filepath);
 /* returns existing Image when filename/type is same (frame optional) */
 struct Image *BKE_image_load_exists(const char *filepath);
 
 /* adds image, adds ibuf, generates color or pattern */
-struct Image *BKE_image_add_generated(unsigned int width, unsigned int height, const char *name, int depth, int floatbuf, short uvtestgrid, float color[4]);
+struct Image *BKE_image_add_generated(struct Main *bmain, unsigned int width, unsigned int height, const char *name, int depth, int floatbuf, short gen_type, float color[4]);
 /* adds image from imbuf, owns imbuf */
 struct Image *BKE_image_add_from_imbuf(struct ImBuf *ibuf);
 
diff --git a/source/blender/blenkernel/BKE_lamp.h b/source/blender/blenkernel/BKE_lamp.h
index 244decf9d52..205c7c7d1e6 100644
--- a/source/blender/blenkernel/BKE_lamp.h
+++ b/source/blender/blenkernel/BKE_lamp.h
@@ -37,9 +37,10 @@ extern "C" {
 #endif
 
 struct Lamp;
+struct Main;
 struct Scene;
 
-struct Lamp *BKE_lamp_add(const char *name) WARN_UNUSED;
+struct Lamp *BKE_lamp_add(struct Main *bmain, const char *name) WARN_UNUSED;
 struct Lamp *BKE_lamp_copy(struct Lamp *la) WARN_UNUSED;
 struct Lamp *localize_lamp(struct Lamp *la) WARN_UNUSED;
 void BKE_lamp_make_local(struct Lamp *la);
diff --git a/source/blender/blenkernel/BKE_lattice.h b/source/blender/blenkernel/BKE_lattice.h
index fe88f0c580a..b195af18a8e 100644
--- a/source/blender/blenkernel/BKE_lattice.h
+++ b/source/blender/blenkernel/BKE_lattice.h
@@ -35,6 +35,7 @@
  */
 
 struct Lattice;
+struct Main;
 struct Object;
 struct Scene;
 struct DerivedMesh;
@@ -42,7 +43,7 @@ struct BPoint;
 struct MDeformVert;
 
 void BKE_lattice_resize(struct Lattice *lt, int u, int v, int w, struct Object *ltOb);
-struct Lattice *BKE_lattice_add(const char *name);
+struct Lattice *BKE_lattice_add(struct Main *bmain, const char *name);
 struct Lattice *BKE_lattice_copy(struct Lattice *lt);
 void BKE_lattice_free(struct Lattice *lt);
 void BKE_lattice_make_local(struct Lattice *lt);
diff --git a/source/blender/blenkernel/BKE_library.h b/source/blender/blenkernel/BKE_library.h
index b9bb67fa509..5aa82be0541 100644
--- a/source/blender/blenkernel/BKE_library.h
+++ b/source/blender/blenkernel/BKE_library.h
@@ -51,6 +51,12 @@ __attribute__((warn_unused_result))
 __attribute__((nonnull))
 #endif
 ;
+void *BKE_libblock_copy_ex(struct Main *bmain, struct ID *id)
+#ifdef __GNUC__
+__attribute__((warn_unused_result))
+__attribute__((nonnull))
+#endif
+;
 void *BKE_libblock_copy(struct ID *id)
 #ifdef __GNUC__
 __attribute__((warn_unused_result))
diff --git a/source/blender/blenkernel/BKE_mask.h b/source/blender/blenkernel/BKE_mask.h
index cc15ceecbac..b40ad4814f0 100644
--- a/source/blender/blenkernel/BKE_mask.h
+++ b/source/blender/blenkernel/BKE_mask.h
@@ -98,7 +98,7 @@ void BKE_mask_point_select_set(struct MaskSplinePoint *point, const short do_sel
 void BKE_mask_point_select_set_handle(struct MaskSplinePoint *point, const short do_select);
 
 /* general */
-struct Mask *BKE_mask_new(const char *name);
+struct Mask *BKE_mask_new(struct Main *bmain, const char *name);
 struct Mask *BKE_mask_copy_nolib(struct Mask *mask);
 struct Mask *BKE_mask_copy(struct Mask *mask);
 
diff --git a/source/blender/blenkernel/BKE_material.h b/source/blender/blenkernel/BKE_material.h
index dd1b1a7752b..350eaf23f6f 100644
--- a/source/blender/blenkernel/BKE_material.h
+++ b/source/blender/blenkernel/BKE_material.h
@@ -52,7 +52,7 @@ void BKE_material_free_ex(struct Material *ma, int do_id_user);
 void test_object_materials(struct ID *id);
 void resize_object_material(struct Object *ob, const short totcol);
 void init_material(struct Material *ma);
-struct Material *BKE_material_add(const char *name);
+struct Material *BKE_material_add(struct Main *bmain, const char *name);
 struct Material *BKE_material_copy(struct Material *ma);
 struct Material *localize_material(struct Material *ma);
 struct Material *give_node_material(struct Material *ma); /* returns node material or self */
diff --git a/source/blender/blenkernel/BKE_mball.h b/source/blender/blenkernel/BKE_mball.h
index 7a0eea1b009..662bfab10a1 100644
--- a/source/blender/blenkernel/BKE_mball.h
+++ b/source/blender/blenkernel/BKE_mball.h
@@ -32,6 +32,7 @@
  *  \since March 2001
  *  \author nzc
  */
+struct Main;
 struct MetaBall;
 struct Object;
 struct Scene;
@@ -39,7 +40,7 @@ struct MetaElem;
 
 void BKE_mball_unlink(struct MetaBall *mb);
 void BKE_mball_free(struct MetaBall *mb);
-struct MetaBall *BKE_mball_add(const char *name);
+struct MetaBall *BKE_mball_add(struct Main *bmain, const char *name);
 struct MetaBall *BKE_mball_copy(struct MetaBall *mb);
 
 void BKE_mball_make_local(struct MetaBall *mb);
diff --git a/source/blender/blenkernel/BKE_mesh.h b/source/blender/blenkernel/BKE_mesh.h
index cfe562e231c..24535eb1fd6 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -39,6 +39,7 @@ struct DispList;
 struct ListBase;
 struct BMEditMesh;
 struct BMesh;
+struct Main;
 struct Mesh;
 struct MPoly;
 struct MLoop;
@@ -146,7 +147,8 @@ void BKE_mesh_flush_select_from_verts(struct Mesh *me);
 
 void BKE_mesh_unlink(struct Mesh *me);
 void BKE_mesh_free(struct Mesh *me, int unlink);
-struct Mesh *BKE_mesh_add(const char *name);
+struct Mesh *BKE_mesh_add(struct Main *bmain, const char *name);
+struct Mesh *BKE_mesh_copy_ex(struct Main *bmain, struct Mesh *me);
 struct Mesh *BKE_mesh_copy(struct Mesh *me);
 void mesh_update_customdata_pointers(struct Mesh *me, const short do_ensure_tess_cd);
 
diff --git a/source/blender/blenkernel/BKE_movieclip.h b/source/blender/blenkernel/BKE_movieclip.h
index 25d2678ea47..5777a4094bc 100644
--- a/source/blender/blenkernel/BKE_movieclip.h
+++ b/source/blender/blenkernel/BKE_movieclip.h
@@ -43,7 +43,7 @@ struct MovieDistortion;
 void BKE_movieclip_free(struct MovieClip *clip);
 void BKE_movieclip_unlink(struct Main *bmain, struct MovieClip *clip);
 
-struct MovieClip *BKE_movieclip_file_add(const char *name);
+struct MovieClip *BKE_movieclip_file_add(struct Main *bmain, const char *name);
 void BKE_movieclip_reload(struct MovieClip *clip);
 
 struct ImBuf *BKE_movieclip_get_ibuf(struct MovieClip *clip, struct MovieClipUser *user);
diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index 718fa2f9ecd..5024b3636c5 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -299,7 +299,7 @@ struct bNodeTreeType *ntreeGetType(int type);
 struct bNodeType *ntreeGetNodeType(struct bNodeTree *ntree);
 struct bNodeSocketType *ntreeGetSocketType(int type);
 
-struct bNodeTree *ntreeAddTree(const char *name, int type, int nodetype);
+struct bNodeTree *ntreeAddTree(struct Main *bmain, const char *name, int type, int nodetype);
 void              ntreeInitTypes(struct bNodeTree *ntree);
 
 /* copy/free funcs, need to manage ID users */
diff --git a/source/blender/blenkernel/BKE_object.h b/source/blender/blenkernel/BKE_object.h
index bfae1bd2390..54189e26c92 100644
--- a/source/blender/blenkernel/BKE_object.h
+++ b/source/blender/blenkernel/BKE_object.h
@@ -49,6 +49,7 @@ struct bAction;
 struct RenderData;
 struct rctf;
 struct MovieClip;
+struct Main;
 
 void BKE_object_workob_clear(struct Object *workob);
 void BKE_object_workob_calc_parent(struct Scene *scene, struct Object *ob, struct Object *workob);
@@ -78,12 +79,12 @@ void BKE_object_unlink(struct Object *ob);
 int  BKE_object_exists_check(struct Object *obtest);
 int BKE_object_is_in_editmode(struct Object *ob);
 
-struct Object *BKE_object_add_only_object(int type, const char *name);
+struct Object *BKE_object_add_only_object(struct Main *bmain, int type, const char *name);
 struct Object *BKE_object_add(struct Scene *scene, int type);
 void *BKE_object_obdata_add_from_type(int type);
 
+struct Object *BKE_object_copy_ex(struct Main *bmain, struct Object *ob, int copy_caches);
 struct Object *BKE_object_copy(struct Object *ob);
-struct Object *BKE_object_copy_with_caches(struct Object *ob);
 void BKE_object_make_local(struct Object *ob);
 int  BKE_object_is_libdata(struct Object *ob);
 int  BKE_object_obdata_is_libdata(struct Object *ob);
diff --git a/source/blender/blenkernel/BKE_speaker.h b/source/blender/blenkernel/BKE_speaker.h
index 52c177fce57..e2f0fa50a86 100644
--- a/source/blender/blenkernel/BKE_speaker.h
+++ b/source/blender/blenkernel/BKE_speaker.h
@@ -33,7 +33,9 @@
  *  \brief General operations for speakers.
  */
 
-void *BKE_speaker_add(const char *name);
+struct Main;
+
+void *BKE_speaker_add(struct Main *bmain, const char *name);
 struct Speaker *BKE_speaker_copy(struct Speaker *spk);
 void BKE_speaker_make_local(struct Speaker *spk);
 void BKE_speaker_free(struct Speaker *spk);
diff --git a/source/blender/blenkernel/BKE_text.h b/source/blender/blenkernel/BKE_text.h
index be30eba0559..dc84bc67647 100644
--- a/source/blender/blenkernel/BKE_text.h
+++ b/source/blender/blenkernel/BKE_text.h
@@ -45,10 +45,10 @@ struct SpaceText;
 void			BKE_text_free		(struct Text *text);
 void 			txt_set_undostate	(int u);
 int 			txt_get_undostate	(void);
-struct Text*	BKE_text_add	(const char *name);
+struct Text*	BKE_text_add	(struct Main *bmain, const char *name);
 int				txt_extended_ascii_as_utf8(char **str);
 int				BKE_text_reload		(struct Text *text);
-struct Text*	BKE_text_load		(const char *file, const char *relpath);
+struct Text*	BKE_text_load	(struct Main *bmain, const char *file, const char *relpath);
 struct Text*	BKE_text_copy		(struct Text *ta);
 void			BKE_text_unlink		(struct Main *bmain, struct Text *text);
 void			BKE_text_clear      (struct Text *text);
diff --git a/source/blender/blenkernel/BKE_texture.h b/source/blender/blenkernel/BKE_texture.h
index 78fdd26c9e0..f1796373367 100644
--- a/source/blender/blenkernel/BKE_texture.h
+++ b/source/blender/blenkernel/BKE_texture.h
@@ -44,6 +44,7 @@ struct EnvMap;
 struct HaloRen;
 struct Lamp;
 struct LampRen;
+struct Main;
 struct Material;
 struct MTex;
 struct OceanTex;
@@ -69,7 +70,7 @@ int colorband_element_remove(struct ColorBand *coba, int index);
 void colorband_update_sort(struct ColorBand *coba);
 
 void default_tex(struct Tex *tex);
-struct Tex *add_texture(const char *name);
+struct Tex *add_texture(struct Main *bmain, const char *name);
 void tex_set_type(struct Tex *tex, int type);
 void default_mtex(struct MTex *mtex);
 struct MTex *add_mtex(void);
diff --git a/source/blender/blenkernel/BKE_world.h b/source/blender/blenkernel/BKE_world.h
index 7a23bff0184..6bb35e46539 100644
--- a/source/blender/blenkernel/BKE_world.h
+++ b/source/blender/blenkernel/BKE_world.h
@@ -33,11 +33,12 @@
  *  \author nzc
  */
 
+struct Main;
 struct World;
 
 void BKE_world_free(struct World *sc);
 void BKE_world_free_ex(struct World *sc, int do_id_user);
-struct World *add_world(const char *name);
+struct World *add_world(struct Main *bmian, const char *name);
 struct World *BKE_world_copy(struct World *wrld);
 struct World *localize_world(struct World *wrld);
 void BKE_world_make_local(struct World *wrld);
diff --git a/source/blender/blenkernel/intern/action.c b/source/blender/blenkernel/intern/action.c
index 5ccf9146440..509442b1d4e 100644
--- a/source/blender/blenkernel/intern/action.c
+++ b/source/blender/blenkernel/intern/action.c
@@ -78,11 +78,11 @@
 
 /* ***************** Library data level operations on action ************** */
 
-bAction *add_empty_action(const char name[])
+bAction *add_empty_action(Main *bmain, const char name[])
 {
 	bAction *act;
 	
-	act = BKE_libblock_alloc(&G.main->action, ID_AC, name);
+	act = BKE_libblock_alloc(&bmain->action, ID_AC, name);
 	
 	return act;
 }	
diff --git a/source/blender/blenkernel/intern/anim_sys.c b/source/blender/blenkernel/intern/anim_sys.c
index df2cc7cc461..74e44eab281 100644
--- a/source/blender/blenkernel/intern/anim_sys.c
+++ b/source/blender/blenkernel/intern/anim_sys.c
@@ -499,7 +499,7 @@ void BKE_animdata_separate_by_basepath(ID *srcID, ID *dstID, ListBase *basepaths
 	if (srcAdt->action) {
 		/* set up an action if necessary, and name it in a similar way so that it can be easily found again */
 		if (dstAdt->action == NULL) {
-			dstAdt->action = add_empty_action(srcAdt->action->id.name + 2);
+			dstAdt->action = add_empty_action(G.main, srcAdt->action->id.name + 2);
 		}
 		else if (dstAdt->action == srcAdt->action) {
 			printf("Argh! Source and Destination share animation! ('%s' and '%s' both use '%s') Making new empty action\n",
@@ -507,7 +507,7 @@ void BKE_animdata_separate_by_basepath(ID *srcID, ID *dstID, ListBase *basepaths
 			
 			/* TODO: review this... */
 			id_us_min(&dstAdt->action->id);
-			dstAdt->action = add_empty_action(dstAdt->action->id.name + 2);
+			dstAdt->action = add_empty_action(G.main, dstAdt->action->id.name + 2);
 		}
 			
 		/* loop over base paths, trying to fix for each one... */
diff --git a/source/blender/blenkernel/intern/armature.c b/source/blender/blenkernel/intern/armature.c
index 3a705a07e22..b678ef6d93c 100644
--- a/source/blender/blenkernel/intern/armature.c
+++ b/source/blender/blenkernel/intern/armature.c
@@ -74,11 +74,11 @@
 
 /* **************** Generic Functions, data level *************** */
 
-bArmature *BKE_armature_add(const char *name)
+bArmature *BKE_armature_add(Main *bmain, const char *name)
 {
 	bArmature *arm;
 
-	arm = BKE_libblock_alloc(&G.main->armature, ID_AR, name);
+	arm = BKE_libblock_alloc(&bmain->armature, ID_AR, name);
 	arm->deformflag = ARM_DEF_VGROUP | ARM_DEF_ENVELOPE;
 	arm->flag = ARM_COL_CUSTOM; /* custom bone-group colors */
 	arm->layer = 1;
diff --git a/source/blender/blenkernel/intern/brush.c b/source/blender/blenkernel/intern/brush.c
index 70eaa00b82e..9a32a50ca00 100644
--- a/source/blender/blenkernel/intern/brush.c
+++ b/source/blender/blenkernel/intern/brush.c
@@ -109,11 +109,11 @@ static void brush_defaults(Brush *brush)
 
 /* Datablock add/copy/free/make_local */
 
-Brush *BKE_brush_add(const char *name)
+Brush *BKE_brush_add(Main *bmain, const char *name)
 {
 	Brush *brush;
 
-	brush = BKE_libblock_alloc(&G.main->brush, ID_BR, name);
+	brush = BKE_libblock_alloc(&bmain->brush, ID_BR, name);
 
 	/* enable fake user by default */
 	brush->id.flag |= LIB_FAKEUSER;
@@ -419,7 +419,7 @@ int BKE_brush_texture_set_nr(Brush *brush, int nr)
 	idtest = (ID *)BLI_findlink(&G.main->tex, nr - 1);
 	if (idtest == NULL) { /* new tex */
 		if (id) idtest = (ID *)BKE_texture_copy((Tex *)id);
-		else idtest = (ID *)add_texture("Tex");
+		else idtest = (ID *)add_texture(G.main, "Tex");
 		idtest->us--;
 	}
 	if (idtest != id) {
diff --git a/source/blender/blenkernel/intern/camera.c b/source/blender/blenkernel/intern/camera.c
index d1842b99831..34c2d144f4c 100644
--- a/source/blender/blenkernel/intern/camera.c
+++ b/source/blender/blenkernel/intern/camera.c
@@ -50,11 +50,11 @@
 
 /****************************** Camera Datablock *****************************/
 
-void *BKE_camera_add(const char *name)
+void *BKE_camera_add(Main *bmain, const char *name)
 {
 	Camera *cam;
 	
-	cam =  BKE_libblock_alloc(&G.main->camera, ID_CA, name);
+	cam =  BKE_libblock_alloc(&bmain->camera, ID_CA, name);
 
 	cam->lens = 35.0f;
 	cam->sensor_x = DEFAULT_SENSOR_WIDTH;
diff --git a/source/blender/blenkernel/intern/curve.c b/source/blender/blenkernel/intern/curve.c
index a6e68b9b2d5..5f7662f5004 100644
--- a/source/blender/blenkernel/intern/curve.c
+++ b/source/blender/blenkernel/intern/curve.c
@@ -167,11 +167,11 @@ void BKE_curve_free(Curve *cu)
 		MEM_freeN(cu->tb);
 }
 
-Curve *BKE_curve_add(const char *name, int type)
+Curve *BKE_curve_add(Main *bmain, const char *name, int type)
 {
 	Curve *cu;
 
-	cu = BKE_libblock_alloc(&G.main->curve, ID_CU, name);
+	cu = BKE_libblock_alloc(&bmain->curve, ID_CU, name);
 	copy_v3_fl(cu->size, 1.0f);
 	cu->flag = CU_FRONT | CU_BACK | CU_DEFORM_BOUNDS_OFF | CU_PATH_RADIUS;
 	cu->pathlen = 100;
diff --git a/source/blender/blenkernel/intern/group.c b/source/blender/blenkernel/intern/group.c
index 20d874e7243..639d256a067 100644
--- a/source/blender/blenkernel/intern/group.c
+++ b/source/blender/blenkernel/intern/group.c
@@ -127,11 +127,11 @@ void BKE_group_unlink(Group *group)
 	group->id.us = 0;
 }
 
-Group *add_group(const char *name)
+Group *add_group(Main *bmain, const char *name)
 {
 	Group *group;
 	
-	group = BKE_libblock_alloc(&G.main->group, ID_GR, name);
+	group = BKE_libblock_alloc(&bmain->group, ID_GR, name);
 	group->layer = (1 << 20) - 1;
 	return group;
 }
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index 82b0d231869..39d76eb36f1 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -242,11 +242,11 @@ void BKE_image_free(Image *ima)
 }
 
 /* only image block itself */
-static Image *image_alloc(const char *name, short source, short type)
+static Image *image_alloc(Main *bmain, const char *name, short source, short type)
 {
 	Image *ima;
 
-	ima = BKE_libblock_alloc(&G.main->image, ID_IM, name);
+	ima = BKE_libblock_alloc(&bmain->image, ID_IM, name);
 	if (ima) {
 		ima->ok = IMA_OK;
 
@@ -325,7 +325,7 @@ static void image_assign_ibuf(Image *ima, ImBuf *ibuf, int index, int frame)
 /* empty image block, of similar type and filename */
 Image *BKE_image_copy(Image *ima)
 {
-	Image *nima = image_alloc(ima->id.name + 2, ima->source, ima->type);
+	Image *nima = image_alloc(G.main, ima->id.name + 2, ima->source, ima->type);
 
 	BLI_strncpy(nima->name, ima->name, sizeof(ima->name));
 
@@ -568,7 +568,7 @@ static void image_init_color_management(Image *ima)
 	}
 }
 
-Image *BKE_image_load(const char *filepath)
+Image *BKE_image_load(Main *bmain, const char *filepath)
 {
 	Image *ima;
 	int file, len;
@@ -576,7 +576,7 @@ Image *BKE_image_load(const char *filepath)
 	char str[FILE_MAX];
 
 	BLI_strncpy(str, filepath, sizeof(str));
-	BLI_path_abs(str, G.main->name);
+	BLI_path_abs(str, bmain->name);
 
 	/* exists? */
 	file = BLI_open(str, O_BINARY | O_RDONLY, 0);
@@ -589,7 +589,7 @@ Image *BKE_image_load(const char *filepath)
 	while (len > 0 && filepath[len - 1] != '/' && filepath[len - 1] != '\\') len--;
 	libname = filepath + len;
 
-	ima = image_alloc(libname, IMA_SRC_FILE, IMA_TYPE_IMAGE);
+	ima = image_alloc(bmain, libname, IMA_SRC_FILE, IMA_TYPE_IMAGE);
 	BLI_strncpy(ima->name, filepath, sizeof(ima->name));
 
 	if (BLI_testextensie_array(filepath, imb_ext_movie))
@@ -631,7 +631,7 @@ Image *BKE_image_load_exists(const char *filepath)
 		}
 	}
 
-	return BKE_image_load(filepath);
+	return BKE_image_load(G.main, filepath);
 }
 
 static ImBuf *add_ibuf_size(unsigned int width, unsigned int height, const char *name, int depth, int floatbuf, short gen_type,
@@ -691,10 +691,10 @@ static ImBuf *add_ibuf_size(unsigned int width, unsigned int height, const char
 }
 
 /* adds new image block, creates ImBuf and initializes color */
-Image *BKE_image_add_generated(unsigned int width, unsigned int height, const char *name, int depth, int floatbuf, short gen_type, float color[4])
+Image *BKE_image_add_generated(Main *bmain, unsigned int width, unsigned int height, const char *name, int depth, int floatbuf, short gen_type, float color[4])
 {
 	/* on save, type is changed to FILE in editsima.c */
-	Image *ima = image_alloc(name, IMA_SRC_GENERATED, IMA_TYPE_UV_TEST);
+	Image *ima = image_alloc(bmain, name, IMA_SRC_GENERATED, IMA_TYPE_UV_TEST);
 
 	if (ima) {
 		ImBuf *ibuf;
@@ -720,7 +720,7 @@ Image *BKE_image_add_from_imbuf(ImBuf *ibuf)
 	/* on save, type is changed to FILE in editsima.c */
 	Image *ima;
 
-	ima = image_alloc(BLI_path_basename(ibuf->name), IMA_SRC_FILE, IMA_TYPE_IMAGE);
+	ima = image_alloc(G.main, BLI_path_basename(ibuf->name), IMA_SRC_FILE, IMA_TYPE_IMAGE);
 
 	if (ima) {
 		BLI_strncpy(ima->name, ibuf->name, FILE_MAX);
@@ -2104,7 +2104,7 @@ Image *BKE_image_verify_viewer(int type, const char *name)
 				break;
 
 	if (ima == NULL)
-		ima = image_alloc(name, IMA_SRC_VIEWER, type);
+		ima = image_alloc(G.main, name, IMA_SRC_VIEWER, type);
 
 	/* happens on reload, imagewindow cannot be image user when hidden*/
 	if (ima->id.us == 0)
diff --git a/source/blender/blenkernel/intern/ipo.c b/source/blender/blenkernel/intern/ipo.c
index 59dd02849dd..c5364744b2d 100644
--- a/source/blender/blenkernel/intern/ipo.c
+++ b/source/blender/blenkernel/intern/ipo.c
@@ -1548,7 +1548,7 @@ static void ipo_to_animdata(ID *id, Ipo *ipo, char actname[], char constname[],
 			
 			BLI_snprintf(nameBuf, sizeof(nameBuf), "CDA:%s", ipo->id.name + 2);
 			
-			adt->action = add_empty_action(nameBuf);
+			adt->action = add_empty_action(G.main, nameBuf);
 			if (G.debug & G_DEBUG) printf("\t\tadded new action - '%s'\n", nameBuf);
 		}
 		
@@ -2093,7 +2093,7 @@ void do_versions_ipos_to_animato(Main *main)
 			bAction *new_act;
 			
 			/* add a new action for this, and convert all data into that action */
-			new_act = add_empty_action(id->name + 2);
+			new_act = add_empty_action(main, id->name + 2);
 			ipo_to_animato(NULL, ipo, NULL, NULL, NULL, NULL, &new_act->curves, &drivers);
 			new_act->idroot = ipo->blocktype;
 		}
diff --git a/source/blender/blenkernel/intern/lamp.c b/source/blender/blenkernel/intern/lamp.c
index 2f37db846f3..32cc5c6c22e 100644
--- a/source/blender/blenkernel/intern/lamp.c
+++ b/source/blender/blenkernel/intern/lamp.c
@@ -54,11 +54,11 @@
 #include "BKE_main.h"
 #include "BKE_node.h"
 
-Lamp *BKE_lamp_add(const char *name)
+Lamp *BKE_lamp_add(Main *bmain, const char *name)
 {
 	Lamp *la;
 	
-	la =  BKE_libblock_alloc(&G.main->lamp, ID_LA, name);
+	la =  BKE_libblock_alloc(&bmain->lamp, ID_LA, name);
 	
 	la->r = la->g = la->b = la->k = 1.0f;
 	la->haint = la->energy = 1.0f;
diff --git a/source/blender/blenkernel/intern/lattice.c b/source/blender/blenkernel/intern/lattice.c
index 05d7933e1b5..fd57a88e279 100644
--- a/source/blender/blenkernel/intern/lattice.c
+++ b/source/blender/blenkernel/intern/lattice.c
@@ -180,11 +180,11 @@ void BKE_lattice_resize(Lattice *lt, int uNew, int vNew, int wNew, Object *ltOb)
 	MEM_freeN(vertexCos);
 }
 
-Lattice *BKE_lattice_add(const char *name)
+Lattice *BKE_lattice_add(Main *bmain, const char *name)
 {
 	Lattice *lt;
 	
-	lt = BKE_libblock_alloc(&G.main->latt, ID_LT, name);
+	lt = BKE_libblock_alloc(&bmain->latt, ID_LT, name);
 	
 	lt->flag = LT_GRID;
 	
diff --git a/source/blender/blenkernel/intern/library.c b/source/blender/blenkernel/intern/library.c
index 817068ae41e..cd40f752b03 100644
--- a/source/blender/blenkernel/intern/library.c
+++ b/source/blender/blenkernel/intern/library.c
@@ -742,13 +742,13 @@ void BKE_libblock_copy_data(ID *id, const ID *id_from, const short do_action)
 }
 
 /* used everywhere in blenkernel */
-void *BKE_libblock_copy(ID *id)
+void *BKE_libblock_copy_ex(Main *bmain, ID *id)
 {
 	ID *idn;
 	ListBase *lb;
 	size_t idn_len;
 
-	lb = which_libbase(G.main, GS(id->name));
+	lb = which_libbase(bmain, GS(id->name));
 	idn = BKE_libblock_alloc(lb, GS(id->name), id->name + 2);
 
 	assert(idn != NULL);
@@ -769,6 +769,11 @@ void *BKE_libblock_copy(ID *id)
 	return idn;
 }
 
+void *BKE_libblock_copy(ID *id)
+{
+	return BKE_libblock_copy_ex(G.main, id);
+}
+
 static void BKE_library_free(Library *lib)
 {
 	if (lib->packedfile)
diff --git a/source/blender/blenkernel/intern/mask.c b/source/blender/blenkernel/intern/mask.c
index bda924060d5..960432d6b3d 100644
--- a/source/blender/blenkernel/intern/mask.c
+++ b/source/blender/blenkernel/intern/mask.c
@@ -698,18 +698,18 @@ void BKE_mask_point_select_set_handle(MaskSplinePoint *point, const short do_sel
 }
 
 /* only mask block itself */
-static Mask *mask_alloc(const char *name)
+static Mask *mask_alloc(Main *bmain, const char *name)
 {
 	Mask *mask;
 
-	mask = BKE_libblock_alloc(&G.main->mask, ID_MSK, name);
+	mask = BKE_libblock_alloc(&bmain->mask, ID_MSK, name);
 
 	mask->id.flag |= LIB_FAKEUSER;
 
 	return mask;
 }
 
-Mask *BKE_mask_new(const char *name)
+Mask *BKE_mask_new(Main *bmain, const char *name)
 {
 	Mask *mask;
 	char mask_name[MAX_ID_NAME - 2];
@@ -719,7 +719,7 @@ Mask *BKE_mask_new(const char *name)
 	else
 		strcpy(mask_name, "Mask");
 
-	mask = mask_alloc(mask_name);
+	mask = mask_alloc(bmain, mask_name);
 
 	/* arbitrary defaults */
 	mask->sfra = 1;
diff --git a/source/blender/blenkernel/intern/material.c b/source/blender/blenkernel/intern/material.c
index f19dc93198d..47117658b5e 100644
--- a/source/blender/blenkernel/intern/material.c
+++ b/source/blender/blenkernel/intern/material.c
@@ -206,11 +206,11 @@ void init_material(Material *ma)
 	ma->preview = NULL;
 }
 
-Material *BKE_material_add(const char *name)
+Material *BKE_material_add(Main *bmain, const char *name)
 {
 	Material *ma;
 
-	ma = BKE_libblock_alloc(&G.main->mat, ID_MA, name);
+	ma = BKE_libblock_alloc(&bmain->mat, ID_MA, name);
 	
 	init_material(ma);
 	
@@ -1778,7 +1778,7 @@ static short convert_tfacenomaterial(Main *main, Mesh *me, MTFace *tf, int flag)
 	}
 	/* create a new material */
 	else {
-		ma = BKE_material_add(idname + 2);
+		ma = BKE_material_add(main, idname + 2);
 
 		if (ma) {
 			printf("TexFace Convert: Material \"%s\" created.\n", idname + 2);
diff --git a/source/blender/blenkernel/intern/mball.c b/source/blender/blenkernel/intern/mball.c
index b3f71e58e9f..d939b9cc3c0 100644
--- a/source/blender/blenkernel/intern/mball.c
+++ b/source/blender/blenkernel/intern/mball.c
@@ -196,11 +196,11 @@ void BKE_mball_free(MetaBall *mb)
 	if (mb->disp.first) BKE_displist_free(&mb->disp);
 }
 
-MetaBall *BKE_mball_add(const char *name)
+MetaBall *BKE_mball_add(Main *bmain, const char *name)
 {
 	MetaBall *mb;
 	
-	mb = BKE_libblock_alloc(&G.main->mball, ID_MB, name);
+	mb = BKE_libblock_alloc(&bmain->mball, ID_MB, name);
 	
 	mb->size[0] = mb->size[1] = mb->size[2] = 1.0;
 	mb->texflag = MB_AUTOSPACE;
diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index dba2fd50706..20ccc33bc4e 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -445,11 +445,11 @@ static void mesh_tessface_clear_intern(Mesh *mesh, int free_customdata)
 	mesh->totface = 0;
 }
 
-Mesh *BKE_mesh_add(const char *name)
+Mesh *BKE_mesh_add(Main *bmain, const char *name)
 {
 	Mesh *me;
 	
-	me = BKE_libblock_alloc(&G.main->mesh, ID_ME, name);
+	me = BKE_libblock_alloc(&bmain->mesh, ID_ME, name);
 	
 	me->size[0] = me->size[1] = me->size[2] = 1.0;
 	me->smoothresh = 30;
@@ -466,7 +466,7 @@ Mesh *BKE_mesh_add(const char *name)
 	return me;
 }
 
-Mesh *BKE_mesh_copy(Mesh *me)
+Mesh *BKE_mesh_copy_ex(Main *bmain, Mesh *me)
 {
 	Mesh *men;
 	MTFace *tface;
@@ -474,7 +474,7 @@ Mesh *BKE_mesh_copy(Mesh *me)
 	int a, i;
 	const int do_tessface = ((me->totface != 0) && (me->totpoly == 0)); /* only do tessface if we have no polys */
 	
-	men = BKE_libblock_copy(&me->id);
+	men = BKE_libblock_copy_ex(bmain, &me->id);
 	
 	men->mat = MEM_dupallocN(me->mat);
 	for (a = 0; a < men->totcol; a++) {
@@ -527,6 +527,11 @@ Mesh *BKE_mesh_copy(Mesh *me)
 	return men;
 }
 
+Mesh *BKE_mesh_copy(Mesh *me)
+{
+	return BKE_mesh_copy_ex(G.main, me);
+}
+
 BMesh *BKE_mesh_to_bmesh(Mesh *me, Object *ob)
 {
 	BMesh *bm;
@@ -1497,7 +1502,7 @@ void BKE_mesh_from_nurbs_displist(Object *ob, ListBase *dispbase, int use_orco_u
 		}
 
 		/* make mesh */
-		me = BKE_mesh_add("Mesh");
+		me = BKE_mesh_add(G.main, "Mesh");
 		me->totvert = totvert;
 		me->totedge = totedge;
 		me->totloop = totloop;
@@ -1519,7 +1524,7 @@ void BKE_mesh_from_nurbs_displist(Object *ob, ListBase *dispbase, int use_orco_u
 		BKE_mesh_calc_edges(me, TRUE);
 	}
 	else {
-		me = BKE_mesh_add("Mesh");
+		me = BKE_mesh_add(G.main, "Mesh");
 		DM_to_mesh(dm, me, ob);
 	}
 
@@ -1635,7 +1640,7 @@ void BKE_mesh_from_curve(Scene *scene, Object *ob)
 	BLI_edgehash_free(eh, NULL);
 
 	if (edges.first) {
-		Curve *cu = BKE_curve_add(ob->id.name + 2, OB_CURVE);
+		Curve *cu = BKE_curve_add(G.main, ob->id.name + 2, OB_CURVE);
 		cu->flag |= CU_3D;
 
 		while (edges.first) {
diff --git a/source/blender/blenkernel/intern/movieclip.c b/source/blender/blenkernel/intern/movieclip.c
index 69e368f0d08..943d9e9452a 100644
--- a/source/blender/blenkernel/intern/movieclip.c
+++ b/source/blender/blenkernel/intern/movieclip.c
@@ -479,11 +479,11 @@ static void put_imbuf_cache(MovieClip *clip, MovieClipUser *user, ImBuf *ibuf, i
 /*********************** common functions *************************/
 
 /* only image block itself */
-static MovieClip *movieclip_alloc(const char *name)
+static MovieClip *movieclip_alloc(Main *bmain, const char *name)
 {
 	MovieClip *clip;
 
-	clip = BKE_libblock_alloc(&G.main->movieclip, ID_MC, name);
+	clip = BKE_libblock_alloc(&bmain->movieclip, ID_MC, name);
 
 	clip->aspx = clip->aspy = 1.0f;
 
@@ -542,7 +542,7 @@ static void detect_clip_source(MovieClip *clip)
  * otherwise creates new.
  * does not load ibuf itself
  * pass on optional frame for #name images */
-MovieClip *BKE_movieclip_file_add(const char *name)
+MovieClip *BKE_movieclip_file_add(Main *bmain, const char *name)
 {
 	MovieClip *clip;
 	int file, len;
@@ -550,7 +550,7 @@ MovieClip *BKE_movieclip_file_add(const char *name)
 	char str[FILE_MAX], strtest[FILE_MAX];
 
 	BLI_strncpy(str, name, sizeof(str));
-	BLI_path_abs(str, G.main->name);
+	BLI_path_abs(str, bmain->name);
 
 	/* exists? */
 	file = BLI_open(str, O_BINARY | O_RDONLY, 0);
@@ -559,7 +559,7 @@ MovieClip *BKE_movieclip_file_add(const char *name)
 	close(file);
 
 	/* ** first search an identical clip ** */
-	for (clip = G.main->movieclip.first; clip; clip = clip->id.next) {
+	for (clip = bmain->movieclip.first; clip; clip = clip->id.next) {
 		BLI_strncpy(strtest, clip->name, sizeof(clip->name));
 		BLI_path_abs(strtest, G.main->name);
 
@@ -580,7 +580,7 @@ MovieClip *BKE_movieclip_file_add(const char *name)
 		len--;
 	libname = name + len;
 
-	clip = movieclip_alloc(libname);
+	clip = movieclip_alloc(bmain, libname);
 	BLI_strncpy(clip->name, name, sizeof(clip->name));
 
 	detect_clip_source(clip);
diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 2062cc01d02..97bee320ecb 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -656,7 +656,7 @@ void nodeDetachNode(struct bNode *node)
 	}
 }
 
-bNodeTree *ntreeAddTree(const char *name, int type, int nodetype)
+bNodeTree *ntreeAddTree(Main *bmain, const char *name, int type, int nodetype)
 {
 	bNodeTree *ntree;
 	bNodeType *ntype;
@@ -670,7 +670,7 @@ bNodeTree *ntreeAddTree(const char *name, int type, int nodetype)
 		BLI_strncpy(ntree->id.name + 2, name, sizeof(ntree->id.name));
 	}
 	else
-		ntree = BKE_libblock_alloc(&G.main->nodetree, ID_NT, name);
+		ntree = BKE_libblock_alloc(&bmain->nodetree, ID_NT, name);
 	
 	ntree->type = type;
 	ntree->nodetype = nodetype;
diff --git a/source/blender/blenkernel/intern/object.c b/source/blender/blenkernel/intern/object.c
index aac1d9f1f7b..2312d801e0d 100644
--- a/source/blender/blenkernel/intern/object.c
+++ b/source/blender/blenkernel/intern/object.c
@@ -829,16 +829,16 @@ int BKE_object_exists_check(Object *obtest)
 void *BKE_object_obdata_add_from_type(int type)
 {
 	switch (type) {
-		case OB_MESH:      return BKE_mesh_add("Mesh");
-		case OB_CURVE:     return BKE_curve_add("Curve", OB_CURVE);
-		case OB_SURF:      return BKE_curve_add("Surf", OB_SURF);
-		case OB_FONT:      return BKE_curve_add("Text", OB_FONT);
-		case OB_MBALL:     return BKE_mball_add("Meta");
-		case OB_CAMERA:    return BKE_camera_add("Camera");
-		case OB_LAMP:      return BKE_lamp_add("Lamp");
-		case OB_LATTICE:   return BKE_lattice_add("Lattice");
-		case OB_ARMATURE:  return BKE_armature_add("Armature");
-		case OB_SPEAKER:   return BKE_speaker_add("Speaker");
+		case OB_MESH:      return BKE_mesh_add(G.main, "Mesh");
+		case OB_CURVE:     return BKE_curve_add(G.main, "Curve", OB_CURVE);
+		case OB_SURF:      return BKE_curve_add(G.main, "Surf", OB_SURF);
+		case OB_FONT:      return BKE_curve_add(G.main, "Text", OB_FONT);
+		case OB_MBALL:     return BKE_mball_add(G.main, "Meta");
+		case OB_CAMERA:    return BKE_camera_add(G.main, "Camera");
+		case OB_LAMP:      return BKE_lamp_add(G.main, "Lamp");
+		case OB_LATTICE:   return BKE_lattice_add(G.main, "Lattice");
+		case OB_ARMATURE:  return BKE_armature_add(G.main, "Armature");
+		case OB_SPEAKER:   return BKE_speaker_add(G.main, "Speaker");
 		case OB_EMPTY:     return NULL;
 		default:
 			printf("BKE_object_obdata_add_from_type: Internal error, bad type: %d\n", type);
@@ -867,14 +867,14 @@ static const char *get_obdata_defname(int type)
 }
 
 /* more general add: creates minimum required data, but without vertices etc. */
-Object *BKE_object_add_only_object(int type, const char *name)
+Object *BKE_object_add_only_object(Main *bmain, int type, const char *name)
 {
 	Object *ob;
 
 	if (!name)
 		name = get_obdata_defname(type);
 
-	ob = BKE_libblock_alloc(&G.main->object, ID_OB, name);
+	ob = BKE_libblock_alloc(&bmain->object, ID_OB, name);
 
 	/* default object vars */
 	ob->type = type;
@@ -960,7 +960,7 @@ Object *BKE_object_add(struct Scene *scene, int type)
 	char name[MAX_ID_NAME];
 
 	BLI_strncpy(name, get_obdata_defname(type), sizeof(name));
-	ob = BKE_object_add_only_object(type, name);
+	ob = BKE_object_add_only_object(G.main, type, name);
 
 	ob->data = BKE_object_obdata_add_from_type(type);
 
@@ -1226,13 +1226,13 @@ void BKE_object_transform_copy(Object *ob_tar, const Object *ob_src)
 	copy_v3_v3(ob_tar->size, ob_src->size);
 }
 
-static Object *object_copy_do(Object *ob, int copy_caches)
+Object *BKE_object_copy_ex(Main *bmain, Object *ob, int copy_caches)
 {
 	Object *obn;
 	ModifierData *md;
 	int a;
 
-	obn = BKE_libblock_copy(&ob->id);
+	obn = BKE_libblock_copy_ex(bmain, &ob->id);
 	
 	if (ob->totcol) {
 		obn->mat = MEM_dupallocN(ob->mat);
@@ -1308,13 +1308,7 @@ static Object *object_copy_do(Object *ob, int copy_caches)
 /* copy objects, will re-initialize cached simulation data */
 Object *BKE_object_copy(Object *ob)
 {
-	return object_copy_do(ob, FALSE);
-}
-
-/* copy objects, will duplicate cached simulation data */
-Object *BKE_object_copy_with_caches(Object *ob)
-{
-	return object_copy_do(ob, TRUE);
+	return BKE_object_copy_ex(G.main, ob, FALSE);
 }
 
 static void extern_local_object(Object *ob)
diff --git a/source/blender/blenkernel/intern/paint.c b/source/blender/blenkernel/intern/paint.c
index dc8aed91c00..d34d5eaa250 100644
--- a/source/blender/blenkernel/intern/paint.c
+++ b/source/blender/blenkernel/intern/paint.c
@@ -43,6 +43,7 @@
 
 #include "BKE_brush.h"
 #include "BKE_context.h"
+#include "BKE_global.h"
 #include "BKE_library.h"
 #include "BKE_paint.h"
 #include "BKE_subsurf.h"
@@ -179,7 +180,7 @@ void BKE_paint_init(Paint *p, const char col[3])
 	/* If there's no brush, create one */
 	brush = paint_brush(p);
 	if (brush == NULL)
-		brush = BKE_brush_add("Brush");
+		brush = BKE_brush_add(G.main, "Brush");
 	paint_brush_set(p, brush);
 
 	memcpy(p->paint_cursor_col, col, 3);
diff --git a/source/blender/blenkernel/intern/speaker.c b/source/blender/blenkernel/intern/speaker.c
index f6599cc9648..f3391803294 100644
--- a/source/blender/blenkernel/intern/speaker.c
+++ b/source/blender/blenkernel/intern/speaker.c
@@ -42,11 +42,11 @@
 #include "BKE_main.h"
 #include "BKE_speaker.h"
 
-void *BKE_speaker_add(const char *name)
+void *BKE_speaker_add(Main *bmain, const char *name)
 {
 	Speaker *spk;
 
-	spk =  BKE_libblock_alloc(&G.main->speaker, ID_SPK, name);
+	spk =  BKE_libblock_alloc(&bmain->speaker, ID_SPK, name);
 
 	spk->attenuation = 1.0f;
 	spk->cone_angle_inner = 360.0f;
diff --git a/source/blender/blenkernel/intern/text.c b/source/blender/blenkernel/intern/text.c
index a0f611a5a7b..3be9097ce82 100644
--- a/source/blender/blenkernel/intern/text.c
+++ b/source/blender/blenkernel/intern/text.c
@@ -171,9 +171,8 @@ void BKE_text_free(Text *text)
 #endif
 }
 
-Text *BKE_text_add(const char *name) 
+Text *BKE_text_add(Main *bmain, const char *name) 
 {
-	Main *bmain = G.main;
 	Text *ta;
 	TextLine *tmp;
 	
@@ -363,9 +362,8 @@ int BKE_text_reload(Text *text)
 	return 1;
 }
 
-Text *BKE_text_load(const char *file, const char *relpath)
+Text *BKE_text_load(Main *bmain, const char *file, const char *relpath)
 {
-	Main *bmain = G.main;
 	FILE *fp;
 	int i, llen, len;
 	unsigned char *buffer;
diff --git a/source/blender/blenkernel/intern/texture.c b/source/blender/blenkernel/intern/texture.c
index 2e909f11eaa..55a0f3752a1 100644
--- a/source/blender/blenkernel/intern/texture.c
+++ b/source/blender/blenkernel/intern/texture.c
@@ -540,9 +540,8 @@ void tex_set_type(Tex *tex, int type)
 
 /* ------------------------------------------------------------------------- */
 
-Tex *add_texture(const char *name)
+Tex *add_texture(Main *bmain, const char *name)
 {
-	Main *bmain = G.main;
 	Tex *tex;
 
 	tex = BKE_libblock_alloc(&bmain->tex, ID_TE, name);
diff --git a/source/blender/blenkernel/intern/world.c b/source/blender/blenkernel/intern/world.c
index ad101c41dc5..206f829eaa8 100644
--- a/source/blender/blenkernel/intern/world.c
+++ b/source/blender/blenkernel/intern/world.c
@@ -79,9 +79,8 @@ void BKE_world_free(World *wrld)
 	BKE_world_free_ex(wrld, TRUE);
 }
 
-World *add_world(const char *name)
+World *add_world(Main *bmain, const char *name)
 {
-	Main *bmain = G.main;
 	World *wrld;
 
 	wrld = BKE_libblock_alloc(&bmain->world, ID_WO, name);