Carving Foam Rocks on the Thunder Mesa Mining Co Part 1

I'm rebuilding my old video archive here on YouTube. Here's a "How-To" from Feb 21, 2016 describing my technique for building rock layers out of extruded polystyrene foam insulation board (the pink stuff from your local home center). This is part 1, covering the cutting and carving of foam to resemble layers of sandstone. I never got around to making a "Part 2," but all of the information about finishing and coloring the foam can be found in these more recent videos:

https://youtu.be/B1yJa09ZjCE
https://youtu.be/_H1-pr9wlfg