This is a x-ray material to make your objects look like an x-ray. Simply apply it to a skull, bone or something else, and it will appear as shown. There are actually two materials. One is transparent, so you can see objects inside and behind it. Another is opaque (skull rendering), for objects that have their interior detailed but you do not want showing through. Both look the same. This material will work with any renderer, since it uses standard 3ds max materials and maps. Aboslutely no textures needed.