Took a break from my Lighthouse scene to work on a few other projects, including this cavern I tried out last week.  I wanted to flesh out a small scene with minimal assets.

Unity Webplayer Link for those who want to try it out.

I sculpted the stalactites and stalagmites in Scupltris, then made a few lower poly versions of varying levels of detail in Blender.  Most of the assets were modeled in Blender, with me alternating between Sculptris and Blender's internal sculpting tools to generate normal maps.  I used 3Ds Max to position the vertex normals on the tree, and you may notice the grass in this scene was taken from my Lighthouse scene.

For texturing, I used Blenders texture pain in a few occasions for the floor and island, mostly relying on a mix a=of Gimp and Krita for all the other editing.  I'm finding Gimp's "Make Seamless" tool is actually really useful for natural looking textures.

The water shader is the same we used in Lens, credit and thanks goes to Adam Burns for letting me use it here.  The murkiness and flow-mapping seemed ideal for an underground river.

Overall, I'm pretty happy with how it turned out, considering I didn't sink more than a few days into it. I was able to make the best of a few assets, and got a few useful materials out of the process.