[Bug 91998] Object rendered completely black in The Book of Unwritten Tales: The Critter Chronicles

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Bug ID 91998
Summary Object rendered completely black in The Book of Unwritten Tales: The Critter Chronicles
Product Mesa
Version git
Hardware Other
OS All
Status NEW
Severity minor
Priority medium
Component Drivers/Gallium/radeonsi
Assignee dri-devel@lists.freedesktop.org
Reporter daniel@constexpr.org
QA Contact dri-devel@lists.freedesktop.org

apitrace: http://constexpr.org/tmp/BOUT-CC-radeonsi.1.trace.xz (95 MiB)

The pipe behind the character is rendered completely black. The object is
rendered without any shader but with fixed-function lighting enabled.

Relevant draw call: 2336877 (in frame 1699)

Disabling GL_LIGHTING, GL_LIGHT3 or setting the GL_DIFFUSE material to [0, 0,
0, 0] (including alpha) causes the pipe to be rendered correctly. Disabling the
other lights has no effect.

The GL_EMISSION material is set to [1, 1, 1, 1] for this draw call so the other
lighting parameters should have no effect (unless they result in NaNs or
negative values).

GPU; Radeon HD 7950 (TAHITI)
Mesa 11.1.0-devel (git-0337a9b)
LLVM r247497
Linux 4.2.0-gentoo-r1

Everything is rendered correctly with llvmpipe.

So far I have only found one object in the game affected by this.


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