[Bug 111490] [REGRESSION] [BISECTED] Shadow Tactics: Blades of the Shogun - problems rendering water

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111490

Ian Romanick <idr at freedesktop.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #2 from Ian Romanick <idr at freedesktop.org> ---
Looking at the nature of the rendering errors, it looks a lot like Z fighting. 
My best guess is that some vertex positions are not being calculated exactly
the same on some rendering passes.  Usually shaders will use some combination
of 'precise' and 'invariant' to instruct the compiler to avoid optimizations
that may break that.  The most likely scenarios are that either the app isn't
using that properly, or we're not respecting it.  It could also be something
else entirely. :)

Either a trace or the output of running the trace with the environment variable
INTEL_DEBUG=vs,tes,tcs,gs,fs,cs before and after the bad commit would help. 
Any of those is likely to be quite large, so bugzilla may not be able to host
the files.

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