https://bugs.freedesktop.org/show_bug.cgi?id=31037
--- Comment #3 from Tom Stellard tstellar@gmail.com 2010-10-29 17:23:57 PDT --- (In reply to comment #2)
In nexuiz, the distortion and squares only appear when the "real dynamic lighting" setting is turned on (under settings / effects).
Can you run nexuiz with RADEON_DEBUG=fp,vp,pstat with and without "real dynamic lighting" and post the output?
Also, does running with RADEON_NO_TCL=1 help?