I have started to create some rock tests to see the best way to build the environment of the alien. I have found that you can easily create interesting rock shapes in Zbrush and simply rotate and combine them to create large, interesting and unique boulders or rock faces. Next on my agenda is to see how i can make some interesting textures that keep it stylized but have some level or detail. This will however come through with the lighting of the environment as well. Below you can see a few of the tests.
This was the first attempt but i went back and did some others. Here is a shot of a test cavern just to see how far i could go with 3 assets. 1 rock. 1 floor plane and 1 character. Turned out nicely.