Simulating curved folding without planar quads?

[DanielPiker]

or this one:

Hinge component

I realise this isn’t exactly what you were asking about, but thought I’d share the example anyway as others might find it useful: _ curvecrease_example.gh (19.2 KB)

edit - I just realised that example is from before TriRemesh and using the buggy old remesh. Here it is with that bit updated:
curvecrease_example.gh (21.3 KB)