[Bug 38256] Myst Online Uru Live: too dark/missing textures

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=38256

--- Comment #5 from Matteo Bruni <matteo.mystral at gmail.com> ---
(In reply to Sebastian Lackner from comment #4)
> Would it make sense to add any error checking for invert_matrix_3d_general,
> or how did native behave before in such odd situations? ^^

Yes, there should be a check there or the BOOL return value from the function
removed.
Specifically Mesa uses an identity matrix when the source matrix is singular. I
should write a test and check what happens on Windows in that case (as unlikely
/ broken that is).
Actually
https://msdn.microsoft.com/en-us/library/windows/desktop/bb172390%28v=vs.85%29.aspx
uses a slightly different definition for the normal matrix. Not sure MSDN is
correct, I should test that too.

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