I haven't viewed this yet, but Emsh was one of the most influential artists who made me want to go into the same kind of work he was doing. It didn't work out that way, but I've never forgotten how much I liked his work back in the sixties.
I've never heard of him. I ran across this by accident. It's a strange little film, but I actually kind of like it.
I have quite a number of books on the shelves from that period with his artwork on the covers.