I've been trying dyslexic drawing, And have managed it. I've drawn an A while drawing a B, A C while drawing a D, My name while dating the drawing; They're not the most polished but they're real. I don't think it's something exclusive to me either, I didn't do it on my own. Know the saying "All things are possible to he who believes"? It's part of Mark 9:23. Also, This may be related; Ricky H. Wilson, Who recorded music with The B-52's and was a founding member, Played "Lava" which sounds as if two guitars are playing at once, But it's one. That's not the only song he played like that, But it might be the clearest example to many. He wasn't singing at the same time but I think it's possible to play that song and sing it too.
Although... I'll tell you a secret: the hand and the most realistic fish are cover-ups for goofs I made in the pattern. If you mentally or digitally remove those elements, you'd see that my pattern doesn't line up exactly the way it should.
It CAN tessellate-- I just took the easy way out, and did a coverup.