Genuinely super grateful for all the input so far.
@CerberaEnded up doing exactly that and going hand-drawn for this one.
Long term It'll be a huge time saver to be able to do this procedurally. I'll keep trying to figure this out with C4D - the toon shader / arnolds equivalent have been super useful so I'm hesitant to give those up. Will keep Houdini/ Renderman in the back of my mind if I'm not getting the results I want. Thanks @Igor 🙂
@everfresh I've actually watched all those tuts on Cineversity already! Those have been a huuuuuge help. Also really fantastic work - especially dig the comp at 1:53. Make more instructional vids, please
Will keep posting updates with results for anyone else interested in doing the same thing