Model exporting

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Edit: nevermind, I just noticed all the other textures are see-trough. I can see the wall coming trough the upper wooden thingey. Is this normal?

2nd edit: How do I have to call the files? I've tried wall_wall.dds and wall_wall1.dds but modelview gives me an error: failed to create .mat for wall_wall1.dds

Yeah, like JustAnotherPlayer said (and Traggey, a page earlier ), make a .mat file with the material editor and apply that. You can't simply apply a texture to a mesh - what people mean when they say they're applying a texture to a mesh is actually always applying a material with the texture in it.

Also make sure your material is a soliddiffuse, not translucent or decal or whatever other options the material editor gives you.