Fix T70605: incorrect darken and lighten rgb mix mode

Differential Revision: https://developer.blender.org/D6058

Reviewers: brecht, fclem

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_mix_rgb.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_mix_rgb.glsl
index abe6081489d..e089aec1d92 100644
--- a/source/blender/gpu/shaders/material/gpu_shader_material_mix_rgb.glsl
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_mix_rgb.glsl
@@ -92,14 +92,14 @@ void mix_diff(float fac, vec4 col1, vec4 col2, out vec4 outcol)
 void mix_dark(float fac, vec4 col1, vec4 col2, out vec4 outcol)
 {
   fac = clamp(fac, 0.0, 1.0);
-  outcol.rgb = min(col1.rgb, col2.rgb * fac);
+  outcol.rgb = mix(col1.rgb, min(col1.rgb, col2.rgb), fac);
   outcol.a = col1.a;
 }
 
 void mix_light(float fac, vec4 col1, vec4 col2, out vec4 outcol)
 {
   fac = clamp(fac, 0.0, 1.0);
-  outcol.rgb = max(col1.rgb, col2.rgb * fac);
+  outcol.rgb = mix(col1.rgb, max(col1.rgb, col2.rgb), fac);
   outcol.a = col1.a;
 }