The 'plushy' effect would do a good job in old dusty rooms of an abandoned hotel in a horror game. Don't know, how fast the shader is to fill a whole room with it, though.

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt