There are problems with textures on my NVIDIA GTX 770, using SteamOS' default nvidia drivers (which are the properietary drivers). There were no problems in Windows and that problems appear in both Wine and native apps. Like in World of Warcraft colors near particles such as portals or fire seem to get tainted for 1 frame like 2-10 times a second, very eye-tiring. Also, in D3D mode I could not see 99% of textures in Dalaran - instead got some trash from VRAM in the background that did not rotate when rotating camera.

In Middle-Earth: Shadow of Mordor some of the textures just won't load, seems like it is always the same textures. Also, the GNOME wallpaper turns into some VRAM trash once I return to Steam and then back to desktop, even though the icons and windows on top of it work like if it was just a wallpaper - blends perfectly with transparency.

http://imgur.com/a/uuLvu