out vec4 sk_FragColor; uniform vec4 colorGreen; uniform vec4 colorRed; vec4 main() { float result = 0.0; mat3 g = mat3(mat2x3(1.0)); result += g[0].x; mat3 h = mat3(mat3x2(1.0)); result += h[0].x; mat4 i = mat4(mat4x3((mat4x2(1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0) * 1.0))); result += i[0].x; mat4 j = mat4(mat3x4(mat2x4(1.0))); result += j[0].x; mat2x4 k = mat2x4((mat4x2(1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0) * 1.0)); result += k[0].x; mat4x2 l = mat4x2(mat2x4(1.0)); result += l[0].x; return result == 6.0 ? colorGreen : colorRed; }