https://bugs.freedesktop.org/show_bug.cgi?id=59492
--- Comment #11 from smoki smoki00790@gmail.com ---
With always true it pass or opside out, with always false or what is now it fails.
I think most if not every racing games fail to render correctly because of this, bugs like missing wheels will be there i guess, or loosed color somewhere, etc. Anyway proper lighting is broken there.