[Bug 16580] S.T.A.L.K.E.R: sky not redrawn correctly with dynamic lighting

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=16580

--- Comment #44 from Alexey Loukianov <mooroon2 at mail.ru> 2012-05-25 13:57:38 CDT ---
Small followup: the incorrect rendering I've been experiencing could be fixed
by turning off GLSL usage (i.e. enabling fallback ARB mode for D3D->OpenGL
shaders translation). This makes me believe that the problem might be somewhere
in GLSL code generator. It is still required to use AlwaysOffscreen mode for
sky to be rendered properly with ARB shaders backend. 

Unfortunately turning AlwaysOffscreen on results in problems with some other
apps, for example FPS drops dramatically in Braid (with AlwaysOffscreen
disabled FPS is smooth 60 @1680x1050, while it drops to around 21-24 FPS after
enabling AO). AFAIK turning AlwaysOffscreen isn't expected to produce huge FPS
dropdowns so it is most likely a bug. As AO is expected to be turned on by
default in future versions of Wine I'm going to file a separate bug report
about FPS dropdown problem in Braid.

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