Orange: New option "Shadow Bias", to extend the boundary between shadow or

no shadow a little bit. Uses same threshold function as the "Bias" button.
(That latter still works, and will use an automatic bias value based on the
geometry, to prevent terminator errors in raytracing).

Anyhoo, with this manual bias you can get rid of terminator problems for
weird diffuse shaders now as well (like tangent or fresnel).

Committed a few more files than needed, that's just code cleanup.

2 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/render/intern/source/rendercore.c b/source/blender/render/intern/source/rendercore.c
index 1a2f942fd2a..739b4a4757f 100644
--- a/source/blender/render/intern/source/rendercore.c
+++ b/source/blender/render/intern/source/rendercore.c
@@ -1658,6 +1658,12 @@ void shade_lamp_loop(ShadeInput *shi, ShadeResult *shr)
 			else
 				phongcorr= 0.0;
 		}
+		else if(ma->sbias!=0.0f) {
+			if(inp>ma->sbias)
+				phongcorr= (inp-ma->sbias)/(inp*(1.0-ma->sbias));
+			else
+				phongcorr= 0.0;
+		}
 		else phongcorr= 1.0;
 		
 		/* diffuse shaders */
diff --git a/source/blender/render/intern/source/shadbuf.c b/source/blender/render/intern/source/shadbuf.c
index c942232bebb..9ff3c104d0a 100644
--- a/source/blender/render/intern/source/shadbuf.c
+++ b/source/blender/render/intern/source/shadbuf.c
@@ -443,7 +443,7 @@ float testshadowbuf(struct ShadBuf *shb, float *rco, float *dxco, float *dyco, f
 	int xs,ys, zs, bias;
 	short a,num;
 	
-	/* if(inp <= 0.0) return 1.0; */
+	if(inp <= 0.0) return 0.0;
 
 	/* rotate renderco en osaco */
 	siz= 0.5*(float)shb->size;