ice cavern modelling

For the ice cavern i have began to model out base meshes in maya in sections, the plan i have for this is to model the whole section then break it down into walls roof and floor and if the time arises take them into zbrush and sculpt further detail into them to create ice flow and direction to the cave so it looks much more realistic in terms of formation, this would then be applied as normal maps and maybe height maps for parallax mapping.

 this is the first small cave section where the player wakes up in, running in UDK with a bright light setup, as a horror game and the fact that the cave is deep under the ice it will be darker, the hole in the roof is where the player falls through so the light will coming from there for this area and create a high contrasted light set up which will probaly result in light shafts with a little light bounce from the surrouding ice.

here i have messed about with the light setup more to create the feel the game and environment needs. i feel this is correct in terms of how it would be lit but as a result the cave seems hard to recognise it as a ice cavern and looks more like rock or maybe underwater scene. but its just a result of the lighting, the material is unchanged from the previous pic so im not sure how to go about this. maybe some tweaks with lights or the material could help the scene.