Numerous fixes in Render code:

- Bug: material emit was ignored (showed in preview render backdrop)
- Bug: world exposure was ignored
- Bug: lamp halo was ignoring 'render layer light override'.

Further reshuffled the way shadows are being pre-calculated, this to enable
more advanced (and faster) usage of Material lightgroups. Now shadows are
being cached in lamps, using a per-sample counter to check if a recalc is
needed. Will also work (later) for Raytracing node shaders.

- New: Material LightGroup option "Always", which always shades the lights
  in the group, independent of visibility layer. (so it allows to move such
  lights to hidden layer, not influencing anything).

1 files changed, 7 insertions, 3 deletions

diff --git a/source/blender/render/intern/include/render_types.h b/source/blender/render/intern/include/render_types.h
index 77beb446c86..247f10bf7a0 100644
--- a/source/blender/render/intern/include/render_types.h
+++ b/source/blender/render/intern/include/render_types.h
@@ -290,8 +290,13 @@ struct MTex;
  * properties of a lightsource.
  */
 
+typedef struct LampShadowSubSample {
+	int samplenr;
+	float shadfac[4];	/* rgba shadow */
+} LampShadowSubSample;
+
 typedef struct LampShadowSample {
-	float shadfac[16][4];	/* 16 = RE_MAX_OSA, 4 = rgba */
+	LampShadowSubSample s[16];	/* MAX OSA */
 } LampShadowSample;
 
 typedef struct LampRen {
@@ -344,8 +349,7 @@ typedef struct LampRen {
 	float area[8][3], areasize;
 	
 	/* passes & node shader support: all shadow info for a pixel */
-	/* struct is currently 2k long... check on alloc? */
-	LampShadowSample shadsamp[BLENDER_MAX_THREADS];
+	LampShadowSample *shadsamp;
 	
 	/* yafray: photonlight params */
 	int YF_numphotons, YF_numsearch;