- another fresnel improvement. :)

  At last irc meeting, eeshlo pointed to an error in the code. It didn't
  use the IOR value correctly. This has been solved. So how it works now:
  - the IOR button value influences (very subtle) the fresnel effect.
    Only for realism diehards.
  - the Fresnel value (slider) now denotes the power in the function
    rf + (1-rf) * (1-c)^5
    where rf= rf = ((ior-1)/(ior+1))^2
    and c the dot-product ray/normal.
  - so, set the slider at '5' and you have real fresnel. Lower values
    for interesting artistic effects.

- put back the forgotten code for gaussian corrected sampling during
  antialising render. Normally, each sub-pixel sample in Blender counts
  equally, and together make up the pixel color.
  With 'Gauss' option set (F10 menu) each sub-pixel sample creates a small
  weighted mask with variable size, which (can) affect neighbouring pixels
  as well. The result is smoother edges, less sensitive for gamma, and
  well suited to reduce motion-aliasing (when things move extreme slow).
  This is result of *long* period of research in NeoGeo days, and based on
  every scientific sampling/reconstructing theory we could find. Plus a
  little bit of our selves. :)

- I should write once how blender constructs Jitter tables for sub-sampling.
  this is a very nice method, and superior to normal block filter or random
  jittering... time!

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/makesdna/DNA_scene_types.h b/source/blender/makesdna/DNA_scene_types.h
index 48c448187f6..679a33ac492 100644
--- a/source/blender/makesdna/DNA_scene_types.h
+++ b/source/blender/makesdna/DNA_scene_types.h
@@ -200,12 +200,12 @@ typedef struct RenderData {
 
 	/** For unified renderer: reduce intensity on boundaries with
 	 * identical materials with this number.*/
-	short same_mat_redux, pad_3[2];
+	short same_mat_redux;
 	
 	/**
 	 * The gamma for the normal rendering. Used when doing
 	 * oversampling, to correctly blend subpixels to pixels.  */
-	float gamma;
+	float gamma, gauss;
 	/** post-production settings. Don't really belong here */
 	float postmul, postgamma, postadd, postigamma;
 	
@@ -282,6 +282,7 @@ typedef struct Scene {
 #define R_MBLUR			0x4000
 #define R_UNIFIED       0x8000
 #define R_RAYTRACE      0x10000
+#define R_GAUSS      	0x20000
 
 /* scemode */
 #define R_DOSEQ			0x0001