Someone asked me if this model was based on the Ukrainian flag. Point in fact, I made this model last year, so it wasn’t. But let’s say it is now.
This design was inspired by Jan Misali’s video about the 48 regular polyhedra. The mucube is a series of connected squares that infinitely tile R3. Whether this really counts as a regular polyhedron is dubious… but obviously a great target for an origami design. I liked it so much that I made two of them. The other is below the fold.