writes:All Alien Squad Leader armies require a type of scenic known as an Installation. For my Hive Mind army, I decided to create an opening to an underground nest.
Previously, I wrote about Foam Hair Rollers and wondered if they had any usefulness. 
Sgt Slag 
suggested:
Filler material for an armature: shape them, roughly; then cover them with Papier-mâché, or similar, to create the outer surface, which is then sculpted, and painted.
So I started playing with the rollers to see what I could do with them.
The roller is a soft foam tube with a coated wire inside. The wire ends in a hook, which holds a plastic end-cap.
If you slip the end-cap off, you can clearly see the hook at the end of the wire.
Once the end-caps are removed, the wire slides freely within the tube, and can easily be removed.
If you chain the hooks together, you can put any number of rollers together to make a longer tube.
So I took one roller, hooked the wires together to form a loop, and glued it down with white glue to a primed base of approximately the required size. (The rules specify a 10cm-square base, and the base I found at a craft store is 9.5cm-square.)
I applied layers of paintable caulk, letting each layer dry before adding the next one, until the structure looked like the mouth of an underground nest.
When all the caulk was dry, I applied a tan basecoat.
The 'hole' was painted black.
I then flocked the base with sand, flocked again with grass-type flock, and sealed everything with a spray of matte clear. LITJO FlexSteel was added underneath. The Installation looked a bit plain, so I added some insects crawling in and out.
And here is the finished result!
I thought that the inside would be hard to see, so I left the painting a bit sloppy. Maybe I'll go back and touch it up someday.
The Insect Warrior (ant) and Armored Insect (cockroach) were leftovers from building the army.
And that completes my project to build a 100-point Hive Mind army.