I dont think textures matter when it comes to splitting of touching brushes. I think it only matter its world or entity.
Even if the buttomface of a crate is nulled the area beneath it will still not be rendered if the crate is a world brush.
You made me think of something though
What if we turned brushes into entities and textured the backfaces with a @texture.
Since the brush would be an entity, it should not cut up the face it touch. Since it has a @texture there will not be rendered through it though, if you can follow me?
Could be interresting to see what the engine thought about that. I guess it would simply act as a normal entity brush, since the @texture would be discarded as its fully covered by a world brush.
To get gl_wireframe to work you might have to run it in singleplay, run map via consol, turn on sv_cheats or something. I dunno if any of that works, since I dont have Steam.
Sorry for hijacking ya thread Carp