thats all good but you cant shoot through it
This is the only way I can think of.
Make two identically sized brushes. Cover one in the playerclip texture, and one in your glass texture, then select the glass texture one and hit Control+T. Scroll up the list of entities and make it a func_brush and there should be an option like "Not Solid" or something, to which you input "Yes". Then make sure they're both placed in exactly the same place.
Hope this helps.
This is the only way I can think of.
Make two identically sized brushes. Cover one in the playerclip texture, and one in your glass texture, then select the glass texture one and hit Control+T. Scroll up the list of entities and make it a func_brush and there should be an option like "Not Solid" or something, to which you input "Yes". Then make sure they're both placed in exactly the same place.
Hope this helps.