Ok this map will show you how to make a one-way wall, window ect.
                       Things you needto know
1 The wall must not touch anything at all, it must float!
2 Tryed making a frame around wall not touching it did not work!
3 Must put the sky texture on one side, will not work if on
  more than one side!
4 Tryed puting a window in front of wall one-way wall did not work!

 
It only took about 4 hours to get all this to work.
Made with worldcraft 1.5

made by TED  
email ted1@alltel.net