Lighting and texturing is half the fun of 3D rendering. Although Carrara has caustics and subsurface scattering, I didn't use it here (I always try to find the fastest way possible). The ice surface was actually just a photograph image map texture in the glow channel and then I had a dark green distance fog make it all fade in the murky distance. The sub had some particle generators attached to it for bubbles.
No portion os this website may be reproduced without express permission of Markus Rothkranz. Carrara, and Carrara Pro is a 3D cgi animation product of Eovia corp.