Created attachment 802=
26 [details]
Xonotic with shadow mapping

Bug still present today in Mesa 9.2.0 (git-c754f7a), kernel 3.9.4.

I saw a similar glitch also in Br=C3=BCtal Legend, Stacking and Costume Que=
st,
especially with ambient occlusion, so I suppose all the games using the Bud=
dha
engine from Double Fine are affected.

I think the bug title should be changed for the following reasons:

The black stripes problem isn't specific to Unigine but happens with at lea=
st 4
different engines: Unigine, Buddha, DarkPlaces and K2.

The 3 people who see the bug here all use an RV670.

There is a workaround for the wrong shaders in the night time scenes.

The black stripes problem seems related to shadows, because disabling them =
in
Xonotic and Heroes of Newerth removes the stripes and disabling ambient
occlusion in games using the Buddha engine reduces the stripes slightly.

So I propose to change the title to: Broken shadows on RV670

I'm not sure if it's just a problem with shadow mapping because even if usi=
ng
stencil shadow volumes works in Xonotic the screenshot posted by Micael of =
the
OgreSampleBrowser exhibit a similar problem and the text: "Technique S=
tencil".

Could the output of any R600_DEBUG setting be useful?

Attached a screenshot of the bug in Xonotic.