mirror writing is only mirrored from a social standpoint
all writing is just random lines we ascribe context to
leonardo was a visual artist
abstracting symbols from strokes is a part of the discipline
and like finding your line while participating in a visual medium mirror writing is best developed through doing
Actually better than that: you can more directly transfer skill from one hand to the other if you’re making exactly mirrored motions.
This is why I think e.g. keyboard instruments should mirror the order of notes between the left and right hand parts. Then you can get away with learning one uniform set of finger motions, instead of two.
Funny. I’m currently learning piano and I thought the same thing. I’m considering writing a small MIDI tool to mirror the order of notes, either for half of one keyboard, or for one whole keyboard next to another.
Have you tried anything like this yet?
EDIT: Apparently it’s been done at least once before, as a physical instrument:
http://www.mim.be/double-piano-with-mirrored-keyboards-by-le...