Rich
Materials can be purchased from GlowForge the laser cutter manufacturer. Each sheet is precut to fit the machine and has a small label with a barcode that is read by one of the cutters cameras to set up the proper laser power and speed for that material. OR you can find other materials from a list with those cutter instructions to set and save your own laser speed and power settings..
The same is true for the FormLabs resin printers. They too sell various resins in cartridges that have barcodes to tell the printer how to use the laser on that resin effectively to make the 3D item,
With Ray's buildings I would need to find some type of material that looks like bricks or can I get sheet plastic and etch the brick design on it?
No, Ray created the bricks and brick texture with his printer. Neat huh!!