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[require] GLSL >= 1.10 [vertex shader] void main() { gl_Position = gl_Vertex; } [fragment shader] uniform vec3 arg0; uniform vec3 arg1; void main() { gl_FragColor = vec4(reflect(arg0, arg1), 0.0); } [test] uniform vec3 arg0 -1.0 0.0 0.0 uniform vec3 arg1 0.70710678 0.70710678 0.0 draw rect -1 -1 2 2 probe rgba 1 1 0.0 1.0 0.0 0.0