I thought I'd share this with you: I always thought HL2 looked much more realistic than e.g. Doom3 (D3 also looks nice, dont get me wrong, but it looks too artificial) - and I guess I have found images that support my claim.
http://www.planethalflife.com/features/articles/sigg04/
goodbye Doom3!
http://www.planethalflife.com/features/articles/sigg04/
goodbye Doom3!