Psychedelic!

Krita includes a tool they call Multibrush, which repeats strokes on a user-selectable number of axes. By default, the centre of rotation is the centre of the image, but that too can be changed. This image uses 16 axes throughout, but the number of axes can be changed on the fly.

It makes the creation of kaleidoscopic mandala images like this one very simple, but I don't really see much use for it other than that. Still, it's a fun toy as far as it goes.