Twilight Gap
Member
Generally, it won't recognize png images unless you download them to your computer and upload them from there.
I think my jpg was just too large. I'd have more success if it was cropped beforehand. I used these for Wild World all the time. It's a bit like a puzzle game fitting the design together with what goes where, and it was much easier in wild world because I'd use the d-pad and A button to lay down the colors. I can't seem to figure out how to paint in New Leaf without the stylus.