Now don't get me wrong we're not talking Source quality here but these Russian guys have managed to make something that is pretty close untilising HDR lighting effects, volumetric fog, bump maps and large detailed areas.
Take a look:
http://mods.moddb.com/4961/paranoia/
Some screens in case you're feeling lazy:
[Blocked Image: http://hl2online.com/paranoia/news_imgs/11-05-2006/p_test_bump2.jpg]
[Blocked Image: http://www.hl2online.com/paranoia/screens/paranoia_640x480_19.jpg]
[Blocked Image: http://www.hl2online.com/paranoia/screens/paranoia_640x480_11.jpg]
[Blocked Image: http://www.hl2online.com/paranoia/screens/paranoia_640x480_15.jpg]
[Blocked Image: http://www.hl2online.com/paranoia/screens/paranoia_640x480_02.jpg]
80% complete apparently, I'm certainly going to keep my eye on this one ![]()