I've added environment mapping to my software based 3D renderer: However, when I export the models from MS3D with my plugin I need to know whether the texture on the material I'm exporting has a tick in the "spheremap" box and can't figure out how to do this. Currently I'm using the logic on the loader in the engine "if the texture name contains a percent sign, set the environment map flag on the mesh" but it's not a very clean way to do it.