These series of polished paintings, we called 'Beauty Pass' were done with Stranglehold 3D team working together very closely. I painted over the early primitive 3D levels. In order to provide the final look of game, concept team was trying to finish paintings up to matte painting level.
You can find the article about stranglehold here
http://features.cgsociety.org/story_custom.php?story_id=4094