Between rain storms I've been working on the Hive Towers. In terms of materials I used the styrofoam planters, sheet foam and spray foam.
I used automotive primer and texture spray paint. The planter is a very regular shape. The spray foam covers the base, bonds the planter to the sheat foam and breaks up some of the regularity of the planter. Another thing that will help with that is the spray paint has solvent in it. That solvent will eat the various types of foam, to a greater or lesser degree.
It etches the regular edges of the planter, and makes the flat sides less true. Using vertical spray movement seems to give a more believable surface. The texture paint also etches the surface, but provides a stoney surface.
I'll flock the base and the use flock in other areas to add interest and detail.
I've linked several various planters and other styrofoam shapes to form a larger set of Hive Towers. These will also get the various layers of spray paint.
I'm building "scatter" terrain that is a couple of feet on a side!
The Table is going to look so much better than last year! I'm really excited to be putting this game on for folks!