Zhann, It seems that you can achieve icey terrains by checking light instead of normal rendeer,use light colored procedural textures and increasing bump height in the material editor, but I'm too impatient to test it our. it turned what was a 5 minute quick test render into an 11 hour test render. I aborted before it got through - wish I'd have saved a pict of it now. Just a thought: offsetting a copy of your tree etc., making it a whitish texture and inreasing bump height and combining them as a boolean might work. BTW your gallery images look very good. - TJ