Render: move Cycles visibility, holdout and shadow catcher properties to Blender

The immediate reason for this is that we want to be able to initialize them
to different defaults for light objects, which is hard with Python properties.
But in general it is useful to be able to share these with other renderers.

As a side effect, Eevee now supports a per-object holdout instead of only
per-collection.

Differential Revision: https://developer.blender.org/D12133

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/object.c b/source/blender/blenkernel/intern/object.c
index 6a309e040c0..f969ca0ff1c 100644
--- a/source/blender/blenkernel/intern/object.c
+++ b/source/blender/blenkernel/intern/object.c
@@ -2081,6 +2081,12 @@ static void object_init(Object *ob, const short ob_type)
   if (ob->type == OB_GPENCIL) {
     ob->dtx |= OB_USE_GPENCIL_LIGHTS;
   }
+
+  if (ob->type == OB_LAMP) {
+    /* Lights are invisible to camera rays and are assumed to be a
+     * shadow catcher by default. */
+    ob->visibility_flag |= OB_HIDE_CAMERA | OB_SHADOW_CATCHER;
+  }
 }
 
 void *BKE_object_obdata_add_from_type(Main *bmain, int type, const char *name)