Commit: 07d0a87b5c20dfc4a404f2354325b91ff21653b2
Author: Brecht Van Lommel
Date: Sat Mar 10 05:03:03 2018 +0100
Branches: master
https://developer.blender.org/rB07d0a87b5c20dfc4a404f2354325b91ff21653b2
Fix T54278: volume artifacts with small density and color after recent changes.
===================================================================
M intern/cycles/kernel/geom/geom_volume.h
===================================================================
diff --git a/intern/cycles/kernel/geom/geom_volume.h
b/intern/cycles/kernel/geom/geom_volume.h
index 286d898992e..a4e47384b25 100644
--- a/intern/cycles/kernel/geom/geom_volume.h
+++ b/intern/cycles/kernel/geom/geom_volume.h
@@ -68,7 +68,7 @@ ccl_device float3 volume_attribute_float3(KernelGlobals *kg,
const ShaderData *s
if(dx) *dx = make_float3(0.0f, 0.0f, 0.0f);
if(dy) *dy = make_float3(0.0f, 0.0f, 0.0f);
- if(r.w != 0.0f && r.w != 1.0f) {
+ if(r.w > 1e-8f && r.w != 1.0f) {
/* For RGBA colors, unpremultiply after interpolation. */
return float4_to_float3(r) / r.w;
}
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