I'm working on new wall structures for my Alien hive (I'm planning to make a MUCH bigger hive soon). I use Apoxy sculpt, a plastic plate and Games Workshop colors (chaos black, metallic medium, Gloss varnish). I'll definately add some parts of broken Alien figures I own.
Here's a wall I'm working on right now:
Size comparison and how it's gonna work together with Aliens:
A closeup:
In the end there will be a lot structures where Aliens can camouflage themselves in - pretty much as seen in Aliens. Poor Dietrich