WEBGL2_OVERLAY_CHECK

const WEBGL2_OVERLAY_CHECK: "if (u_overlayMode == 1.0) {\n    float hatch = step(0.84, fract((gl_FragCoord.x + gl_FragCoord.y) / 12.0));\n    outColor = mix(vec4(0.059, 0.09, 0.165, 1.0), vec4(0.278, 0.333, 0.412, 1.0), hatch);\n    return;\n  }\n\n  if (u_overlayMode == 2.0) {\n    outColor = vec4(1.0, 1.0, 1.0, 0.9);\n    return;\n  }";