Comment by scrooched_moose

Very cool. Images like this are fairly popular in woodworking for low poly pet art:

https://www.reddit.com/r/woodworking/comments/7vcgar/boyfrie...

(search "low poly" on /r/woodworking for a lot more)

DMesh is probably the most popular tool in this space that I've seen, but it's a very manual process (manually select vertexes and it fills the space with the average color).

http://dmesh.thedofl.com/

Yours definitely gives a different look - a bit more aliased - which is interesting. Would be fun to try this one out too.