https://bugs.freedesktop.org/show_bug.cgi?id=41744
--- Comment #11 from kao_chen kaochen2@gmail.com 2011-11-15 09:03:51 PST --- Sorry I have done a mistake, the libtxc-dxtn library was not installed properly on my PC.
I found the source code here: http://debian-multimedia.org/pool/main/libt/libtxc-dxtn/libtxc-dxtn.php
It's working better for me on both Unigine Heaven and Unigine Oilrush game. I still have some graphics artifacts but they probably come from another bug.
Here: Unigine Heaven with wrong shadows: http://pix.toile-libre.org/upload/original/1321376279.png
And
Oilrush, the crane is flying http://pix.toile-libre.org/upload/original/1321376118.png
Regards Kao