shrinking yoshimura decorations
I've thought about combining differently sized yoshimura decorations in one model for a while. finally I've had the needed revelation (either on my way to work or in my bed trying to fall asleep, can't remember which).
it's actually not so difficult at all, you just have to realize how a yoshimura diamond comes into being - you need 2 adjacent pleats of the same width. for my first realization of the principle I decided to have the diamonds shrink exponentially and symmetrically. in the end, though, you are totally free in choosing the diamonds' sizes as is demonstrated here.