I thought to myself: next I'll do a ringed planet. I am affirming now: I'll never do another ringed planet ever again.
What a bear. It took many drafts to get the rings to work, except that they never did. The planet ended up looking like it was wearing a worn-out Tilley hat. Eventually, I relented from trying to render the rings by hand and rotoscoped Saturn's rings from a public-domain NASA photo of Saturn.