[Mesa-dev] [Bug 98002] Mud rendering bug in Portal 2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98002

--- Comment #13 from almos <aaalmosss at gmail.com> ---
Ok, I managed to download the trace with Konqueror. I haven't tried it with
fglrx yet, but I compared the attached screenshot with the YouTube video, and
here are my thoughts.

Actually, the mud is rendered correctly, the problem is with the rocky walls of
the cavern. It looks like the lighting is fullbright, and the fog is missing. I
also read the shader in qapitrace, and I have no idea how it was supposed to
add fog (I'm not an expert on GLSL though).

If you look at the middle of the attached screenshot, you can see some little
black objects in the background. Those are also missing fog.

It seems this bug has been reported to Valve as
https://github.com/ValveSoftware/steam-for-linux/issues/4414 , and it's not
specific to Mesa.

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