Mateusz over at LevelDesign.org, interviewed Chris Kay a Senior Level Designer that works at Crytek on Crysis2
"The key to successfully working with artists is to give them creative freedom, this doesn't mean you have no input for the artistic look of the level (actually it's quite the opposite) but it means you need to carefully balance time spent on artistic tasks. When you have people dedicated to making art and placing it in the levels, the last thing you should do is get in their way all the time."
Check out the rest of the interview.
Thanks Seir for letting us know about this.