World3DPanel and World3DImage

Originally it was our intention to have a more versatile solution (i.e. a way to display all kinds of primitive geometries, like cubes, cylinders etc), maybe we also add something like a simple plane for that purpose (which would be suitable for a 3d panel or a 3d image). Or maybe we just add a "Word3DPanel" or at least a "World3DImage", for reasons of convenience... we'll think about that