pick the texture you want people to be able to walk through. Then go to your texture>common folder, where you have the textures of caulk and all that. Put the texture you want people to walk through in there. Then go to your scripts folder, and open common.shaders in notepad. Scroll to the very bottom of the notepad document, and add this line (i'll be using example.tga as the texture I want to be able to walk through):
Code:
textures/common/example
{
surfaceparm nonsolid
qer_editorimage "textures/common/example.tga"
}
save it, restart gtkradiant, and build.