(In reply to Shmerl from comment #13)
> (In reply to Timothy Arceri from comment #12)
> > For now you could try using the environment variable:
> > 
> > allow_glsl_cross_stage_interpolation_mismatch=true
> 
> Thanks! I tried setting it, and it shows the message that it's overridden,
> but the game still hangs.

Are you sure it is hanging? There is a huge amount of stuttering due to the
game compiling shaders in-game. Its really bad the first time I run the
apitrace but much better the second time.