Sorry Eric, but I have no idea what you mean. Read about it where (couldn't find anything similar in the reference manual)? Can you give another hint please.
I've thought about pony wall, but as far as I can tell the top and bottom portions are split horizontally. Then I looked at a knee wall and got an error message when trying it, something about a parallel wall. Either I'm doing that wrong or its the wrong thing to do. Then I thought about using the break feature, but can't figure out any way to break a wall diagonally. Can I use the soffit function? It seems like you can assign different types of materials (drywall) to overlay existing materials and it sounds like it ends at a ceiling when extended upward.