The Upside-Down Flintrubble Bubble Cake (Not Really)

I found myself with an abundance of packing Styrofoam (the bead-y kind, not peanuts or anything) and I knew that I would do something with it, I just didn't know what.

That was, until I saw this video from TheDungeonMasterG on making "no-trouble rubble."

He makes a pretty small disk to mount the rubble on, but he's working with 28mm minis, I'm working with 1/32 figures. So, CDs it is!

I'm clearly not done yet (painting black and grey/white dry brushing remain), but you can get the idea:

The wooden "beams" are fireplace matchstick pieces

I suppose if I was playing a Stalingrad scenario or something and snow was on the ground, these would work as is. 

In retrospect, I'm not a huge fan of the round basing for the rubble,but I have a ton of blank CDs I'll never use for anything.