I converted the svg file from Laser cut ripples on a pound mc escher by mistercrunch - Thingiverse and then added a bottom to this model.
For the MMU version I cut a box with the model in Tinkercad and then added it back so it could fill in the design.
The attached picture is the MMU version and was printed face down. Printing face down gives the effect of ironing, but your build plate must be in good shape, and you must get a good first layer since that is what is seen. If printed face up, I would recommend using ironing, although that comes at the expense of a longer print time.
The author remixed this model.