I attended the Intermediate training in Las Vegas last year and was taught to create shower walls using railings. If I wanted the lower half a tile pony wall and the upper half glass, I just select pony wall, lower Interior-4 and upper Glass Shower then apply tile as a wall covering to the lower wall half. This works great except I can't figure out how to make the wood framing inside the pony wall be anything but wood. In this case, I want the pony wall to be all tile, including the top and sides. The upper wall that's not glass (see small non-painted drywall strip between the blue vanity wall and shower wall) won't paint either. I know there are a million ways to create shower walls in CA, just looking for your experience on the most user friendly.