I think walls are underused for many reasons, one being because they are a double edged sword - you can block off areas but you also block yourself off. To make them more user-friendly, is it possible to allow friendly units free passage through your own (or team) walls? The wall model is well suited for this and would not look strange. It would simply be your own units going through a "smart" wall system that blocks enemy and friendly fire but allows friendly units to phase through the energy part. I just want to make walls more viable.