While cleaning up yesterday, I found some old sketch books. Some of then are from the era I was working on Zen Bound and early incarnation of Recast.
I thought I'd collect some sketches and screenshots how the Zen Bound level selection tree came to be and put them in a rough timeline. It was really hard process for many reasons. The total time span across about half a year, so many at many times we were diving in muddy waters. Now in retrospect it looks quite a bit more coherent process.
Here's the image, it is really wide image, zoom in!