Photo reference from the media:

unknown, ice cave lab, 20/01/11, http://alexchu.cghub.com/images/page:2/

unknown, red faction armageddon art and pictures, http://www.creativeuncut.com/gallery-16/rfa-ice-cave4.html

unknown, red faction armageddon art and pictures, http://www.creativeuncut.com/gallery-16/rfa-ice-cave3.html

Luke, Ice Cave Environment - Uncharted Inspired - Building an environment, 19/10/11,  http://www.polycount.com/forum/showthread.php?t=90102

Unknown, the ice cave, http://uncharted.wikia.com/wiki/The_Ice_Cave

Lorl, 20/08/09, Uncharted 2's Ice Cave Is Beautiful, http://www.wearetheinternetz.com/2009/08/20/uncharted-2s-ice-cave-is-beautiful-boring/

These screen shots from various games give e a better idea for what is possible with my theme, Frozen Planet. I could go more sci fi or more fantasy, changing the environment completely to my last two projects.