I was inspired to paint this after watching Studio Ghibli's Princess Mononoke. It was painted entirely in The GIMP using a tablet. There are 174 layers. The whole painting took eight days to complete.
Generally, the steps I took for each object in the scene were as follows:
I made four animated/directional brushes to make texturing easier: scribble, moss, grass and leaves.
The depth of field effect was added at the end by consolidating layers and blurring them selectively.
These works are licensed under a Creative Commons Attribution-Share Alike 2.5 Australia License.