I cannot stop coming back to this. I think I’m learning how to make a perfect loop out of this tonight. I totally think it could be done with the first two passes.

Yes, that was infuriating

CNC could do it.

I was thinking the exact same thing. Absolutely has to be a robot.

Gotta be a 2 axis gantry. I mean, it could be a standard 6 axis robot arm, but I seriously doubt it.

Definitely not by hand. There used to be things called pen plotters before printers and 3D printers that everyone seems to be unaware of. An X, Y stage with a pen attached. Replace with a brush. But since those are so rare these days it’s likely a repurposed cnc router rather than a repurposed 3D printer so can fit larger canvas

Probably a 3d printer with the nozzle replaced with a paintbrush could do the job. Maybe a tube through the center of the handle to supply paint.

Must be fed with an internal tube, it’s like a 3d printer