isRenderToTileSupported

If this value is true and there's need for draping (globe or terrain are enabled), then renderToTile will be called to enable the rendering of the custom layer into the texture of a tile. If this value is set, and terrain or globe are active, only render to tile render call for this layer is called, and "immediate mode" render is not called. A custom layer is, at one frame, either rendered to tile or rendered directly.