[require] GLSL >= 1.20 [vertex shader file] glsl-mvp.vert [fragment shader] #version 120 void main() { const float x = floor(-0.5); const float y = floor(0.0); const float z = floor(0.5); gl_FragColor = vec4(x + 1.7, y, z, 1.0); } [test] clear color 0.0 0.0 0.0 0.0 clear ortho draw rect 10 10 10 10 probe rgb 15 15 0.7 0.0 0.0