getGeometryRoughness top-level property
dynamic
getGeometryRoughness
getter/setter pair
Implementation
var getGeometryRoughness = ShaderNode(() {
var dxy = max(abs(dFdx(normalGeometry)), abs(dFdy(normalGeometry)));
var geometryRoughness = max(max(dxy.x, dxy.y), dxy.z);
return geometryRoughness;
});