I recently wrote a piece of software to help me generate a t-shirt design. By parameterizing most of the layout rules, the software assisted me in finding the right Perlin curves, spacing, and dimensions. These coded constraints gave me infinite options to choose from, and I picked my favorite render from about 50 "hand-made" results.
Humble thanks to @todd & @lucian for their feedback while I was working on it
People in Colorado love their mountains, fyi