I've got a major issue with this coloring algorithm which won't render to disk. Unfortunately it's crucial to a design and I've drawn 10 layers apart, rendering them separately to disk until I discovered the culprit. My guess is that it leads to some sort of infinite loop in the rendering process which prevents UF from completing the task. I've also updated all files of the public formulas. If anybody knows a solution I'd be thankful!
Munich based semiprofessional photographer with a thing for fractals since 1987.