Haha... I have tried making a tileset, but the only tileset I finished was simply a masked picture of Vida Guerra that was only for one joke level. But with that in mind, I should know the basic premise of how to make a tileset - it's just about using the JJ2 grid, compromising to find the right palette, and creating a functional mask that's been fully tested.

A good start for me would probably be to work on Let's Make a Tileset. I know there's are still unfinished LMAT projects, maybe I can help get one going again!

What really holds me back is I'm so inexperienced with any serious digital art programs. I have GIMP and Paint Shop Pro trial, I've only used them a few times. I intend to learn how to use them, practice with them and hopefully someday I can create a viable tileset. I suppose the other option is to draw a tileset by hand, but then I wouldn't have an available method of scanning it.