[Bug 93594] Flickering Shadows in The Talos Principle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93594

--- Comment #17 from Roland Scheidegger <sroland at vmware.com> ---
(In reply to Nicolai Hähnle from comment #16)
> 
> One annoying aspect of this language is that one can reasonably read it as
> non-uniformity only being relevant for non-helper fragments. If a pixel quad
> is partial covered by the original primitive, and discard is used in a way
> that keeps the covered pixels but discard the helper ones, should
> derivatives be defined or not?

That's a good question... My interpretation would be that derivatives should be
undefined in this case if only because otherwise things get even more
complex...

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