[Mesa-dev] [Bug 55817] Torchlight: Texture renders as garbage

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=55817

--- Comment #9 from Tim Allen <screwtape at froup.com> ---
(In reply to comment #6)
> - resave the original texture without compression.

I was actually thinking of bug 55445 here; it turns out that decompressing the
texture does *not* solve the issue.

I extracted the problematic texture from the game's data files, resaved it
without compression (using version 2.2.1 of the GIMP DDS plugin), inserted it
back into the game's data, and went back to the same place in the game that the
first screenshots were taken from.

Both these new screenshots were taken with Debian's official Mesa 8.0.4
packages.

Attachment 68653 shows that the uncompressed texture is glitchy in the same
places that the compressed texture is glitchy, although here we get bright
green stripes rather than compression-block squares. It also shows that the
glitchiness affects multiple mipmap levels.

Attachment 68654 shows the same scene, after I hit the 'pause' button (which
causes the game to swoop the camera in close to the player). Here we can see
that the base-level texture looks just fine - no corruption at all. The first
mipmap level has the glitchiness, and if you look closely you can see that it's
also sheared - as though something is using slightly the wrong pitch. Say, 512
pixels instead of 511.

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