With terrain on, if `true`, the map will render for performance priority, which may lead to layer reordering allowing to maximize performance (layers that are draped over terrain will be drawn first, including fill, line, background, hillshade and raster). Any layers that are positioned after symbols are draped last, over symbols. Otherwise, if set to `false`, the map will always be drawn for layer order priority. By default, it is set to `true`.