source/blender/gpu/shaders/gpu_shader_simple_lighting_frag.glsl


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#ifndef USE_INSTANCE_COLOR
uniform vec4 color;
#endif
uniform vec3 light;

#if __VERSION__ == 120
  varying vec3 normal;
#ifdef USE_INSTANCE_COLOR
  varying vec4 finalColor;
#endif
  #define fragColor gl_FragColor
#else
  in vec3 normal;
#ifdef USE_INSTANCE_COLOR
  flat in vec4 finalColor;
  #define color finalColor
#endif
  out vec4 fragColor;
#endif

void main()
{
	fragColor = color * max(0.0, dot(normalize(normal), light));
}