Yeah, i know that, but what do we/you need them for? It's the texture itself. Without it, you won't see anything. Like if you have made a concrete wall texture, you will see the concrete texture. It's simple. VMT = Valve Material Texture. That defines what properties it has. Is it concrete, does it glow, what bumbmap does it have, folder specification. Simply, you need them both. Yes i understood that. Its a material file, but what do we need them for? make walls covered in admin crosswords? (omg i just realized how awesome that must've been)