Phase one of better masking support while rendering.

Problem: artist wants character to walk in grass, but still have all rendered
in seperate render-layers, for postpro effects and vblur. How to efficiently
create a mask image you can put *over* the character for the grass?

Solution has two parts; this commits allows any layer inside of the renderlayers
to become a Z-mask (Z values for solid gets filled in, but not rendered).

Second part of commit is render option "Only render stuff that's in front of
a zbuffer value that was filled in (saves render time)

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_scene_types.h b/source/blender/makesdna/DNA_scene_types.h
index b342bc5afe8..58c15ade575 100644
--- a/source/blender/makesdna/DNA_scene_types.h
+++ b/source/blender/makesdna/DNA_scene_types.h
@@ -120,7 +120,11 @@ typedef struct SceneRenderLayer {
 	struct Group *light_override;
 	
 	unsigned int lay;		/* scene->lay itself has priority over this */
+	unsigned int lay_zmask;	/* has to be after lay, this is for Z-masking */
 	int layflag;
+	
+	int pad;
+	
 	int passflag;			/* pass_xor has to be after passflag */
 	int pass_xor;
 } SceneRenderLayer;