1 files changed, 5 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_rgb_to_bw.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_rgb_to_bw.glsl
new file mode 100644
index 00000000000..ceca02a2356
--- /dev/null
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_rgb_to_bw.glsl
@@ -0,0 +1,5 @@
+void rgbtobw(vec4 color, out float outval)
+{
+  vec3 factors = vec3(0.2126, 0.7152, 0.0722);
+  outval = dot(color.rgb, factors);
+}