[Nouveau] [Bug 111292] Advanced Lighting option in Firestorm Viewer makes some objects black on nv92 card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111292

--- Comment #8 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Note to anyone taking a look... due to either a bug in the shader or a bug in
mesa (depending on one's view), you have to run the trace with

MESA_EXTENSION_ENABLE=-GL_ARB_gpu_shader5

on DX11+ GPUs. Clarifying the behavior now as to which is right (pretty sure
mesa behavior is right), but either way it doesn't affect the OP's problem. The
black floor does not reproduce on a GK208 though.

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