I'm working on the tutorial from Episode 3. I may end up cutting it into two parts; much of Episode 3 is creating a custom pattern for trees/forest. The process is different enough in Gimp that it's taking me awhile to figure it out. I may, in fact, post that as a separate tutorial entirely...I couldn't find any other tutorials on creating seamless patterns in Gimp on this site. In fact, even an Internet search didn't turn up much. Most of the tutorials I found focus on creating texture patterns, which are more photorealistic than the pattern I'm trying to do. Curry's method creates an antique, "hand-drawn" style; he shows you how to hand-draw a forest pattern, then use it to bucket-fill or paint with.

As soon as I get the pattern thing figured out, I'll be posting the next installment. Thanks for reading!

wisemoon