Mayan OpenLOCK A-low-wall

OpenLOCK A-primary-wall-low piece.

I wanted a Mayan style with squarish blocks, and wanted to be able to quickly make any of the tile shapes, so the bricks are created by a Python script running in Blender. The blocks are placed in a method inspired by "Wang tiles". Voronoi and Musgrave noise is applied to each brick for an interesting texture.

Future work: vary noise parameters per-brick; vary brick depth; vary brick corner roundness; automatically add cracks.