[Bug 17423] Prince of Persia SoT: Graphic Bug

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=17423





--- Comment #5 from Stefan Dösinger <stefandoesinger at gmx.at>  2009-02-20 06:33:49 ---
I can reproduce this bug with the demo

What confuses me though is that the fog behavior this game expects is different
from what my test shows. The game uses vertex shaders that write fog coords,
and sets D3DRS_FOGTABLEMODE to linear fog. FOGVERTEXMODE is zero. My test says
that in this case the vertex shader fog coord is ignored and d3d always uses
the Z coordinate, because per-vertex fog coordinates only work with per-vertex
fog(FOGTABLEMODE = NONE). The game however expects the vertex shader fog
coordinates to be used.

I can think of 3 possibilities:

1) I missed something and my test is wrong
2) There is some capability flag that changes the behavior, and POPSOT might
behave differently on Windows than on Wine due to caps differences
3) There's some game specific quirk in the Windows driver.


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