This is a small bug that shouldn't take too much to ferret out. Looking around corners crashes the engine, but this was a hack in G-I as well. The biggest flaw is jittery texture mapping above 2 or 3x magnification. This is next on the attack list. The engine right now is about twice as fast as than G-I, but we have some optimizations in mind to throw in.
Sprite objects are next on the features list, too.