[Mesa-dev] [Bug 109599] small shadows are not drawn in various games (shadow map bias issue?)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109599

Samuel Pitoiset <samuel.pitoiset at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |NOTABUG
             Status|NEW                         |RESOLVED

--- Comment #29 from Samuel Pitoiset <samuel.pitoiset at gmail.com> ---
No because it's not a bug.

Per the Vulkan spec "26.11.3. Depth Bias":

"depthBiasSlopeFactor scales the maximum depth slope of the polygon, and
depthBiasConstantFactor scales an implementation-dependent constant that
relates to the usable resolution of the depth buffer."

and,

"The minimum resolvable difference r is an implementation-dependent parameter
that depends on the depth buffer representation."

That means, it might render differently based on that implementation-dependent
parameter. Note that it likely renders something different with NVIDIA as well.

Closing as we can't do anything.
Thanks for the report!

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