Alright, great information, thanks. Khorns no, CW II's yes.
Just to clarify, the room is not triangular. It is a rectangle 19' long and 15' wide at the widest. It is just narrower at one end. The curtain is hung 20" out from the front wall behind it. So in the original picture I posted, the first sidewall behind the left speaker is longer than it looks at 3' 10" long. From there the room gets wider by 3' to the left, then the sidewall continues all the way to the back wall. On the ride side (picture below) the room gets wider by 1' 4" to the right at 9' from the front wall.