proceduralMaterialTestNormal.fs

float getProceduralColors(inout vec3 diffuse, inout vec3 specular, inout float shininess) {
    TransformCamera cam = getTransformCamera();
    vec4 position = cam._viewInverse * _positionES;
    if (mod(position.y + cos(iGlobalTime), 0.25) < 0.125 + 0.05 * cos(iGlobalTime * 1.5)) {
         discard;
    }
    diffuse = 0.5 * (normalize(_normalWS) + vec3(1.0));
    return 0.0;
}