Bump map direction reversed on Intel cards in Linux

[jbaicoianu]

It looks like there is some sort of difference in how Intel and Nvidia cards process bump maps (at least in Linux - I haven't verified in other operating systems yet).

The different is most obvious on the baseball stitching and the tennis ball seams - on Nvidia the stitching looks raised, but on Intel it looks recessed.

Nvidia:

Intel:

[mrdoob]

I guess these intel drivers for linux are buggy? Intel on MacOS seems to work as expected.

[metal3d]

Same here on Fedora 20 with Intel drivers. Bump map is inverted... Any solution to detect card ?

[mrdoob]

Any solution to detect card ?

Nope, but considering that Intel drivers are open source, they probably have some page to report the issue?

[metal3d]

I tried to find this page several hours ago. I will find it... ;)

[metal3d]

Done.
https://bugs.freedesktop.org/show_bug.cgi?id=82991

@jbaicoianu I guess you can vote or comment this bug report. ;)

[dubejf]

According to the mesa bug tracker, this issue with Intel drivers has been addressed.