After looking on Ebay and seeing people sell rectangular pieces of wood to be used as Doll House roof shingles, I decided to be a little more efficient.
Instead of manually gluing each individual shingle and paying an arm and a leg for a bag of wood chips, I created a 3D model in CorelDraw that can be laser engraved to create a 3D surface.
This SVG file is just a small portion, you can resize it, copy / paste, etc... Until you reach your desired size.
This was created using the contour tool in CorelDraw to create a 3D gray scale height map that the laser can interpret.
Requires laser cutter/engraver that supports 3D in the print driver.
Open file and print