The alien has arrived & its hungry. Prepare to be infested!
5th edition 40K brings strict line of sight to the terrain rules. The solution is area terrain with defined places for all objects. A 1/4 MDF board is drilled with sockets for 60mm and 40mm wooden disks. Look for this terrain system at the upcoming Adepticon convention.
For these two terrain sets, each disk holds a mini-diorama built from Hirst Arts blocks, PVC pipe, a plastic Easter egg and lots of Terrain Putty (light tan) & Apoxie Sculpt (light gray) epoxy putty. In addition to standard sand flocking, the MDF board is also coated with a mix of play sand applied wet & saturated with white glue. The ridges represent underground tentacle growth from the infestation, hopefully the effect will be more noticeable once painted.