out vec4 fragColor; void main() { const float intensity = 0.25; #ifdef SHADOW_PASS fragColor = vec4((gl_FrontFacing) ? vec3(intensity, -intensity, 0.0) : vec3(-intensity, intensity, 0.0), 1.0); #else fragColor = vec4((gl_FrontFacing) ? vec3(intensity, intensity, -intensity) : vec3(-intensity, -intensity, intensity), 1.0); #endif }