http://bugs.winehq.org/show_bug.cgi?id=22779
matejcik@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |matejcik@gmail.com
--- Comment #1 from matejcik@gmail.com 2010-06-11 11:17:19 --- i am seeing this too with Radeon HD 4670 (fglrx) and Ubuntu 10.04, on 32bit installation, Wine from PPA.
my previous GPU from NVidia was without problems.
In Portal, glitches disappear when i set dxlevel to < 90. When dxlevel is 90 or higher, glitches appear especially with "difficult" surfaces like reflections and bump maps.
page[1] suggests that DirectX 9 enables the following features: * Refractions with the use of a bump-map * High-quality reflective water (used frequently) * Softer edge dynamic shadows * Normal-mapped lighting on models * Improved-quality specular effects * High dynamic range rendering so at least one of them is probably causing the mess.
just to be sure, i tested in windows and the glitches do not appear, thus ruling out hardware failure
[1] http://developer.valvesoftware.com/wiki/DirectX_Versions