This is very cool. I’ve been a big fan of Flight404‘s work for a while now, and just spotted this on his Vimeo page. I won’t feel at all bad about blatantly copying it, because I got half way to doing it anyway, with my CubeIterator qcFX, which is included with the current VDMX beta.
I did several versions of the Iterator qcFX, using different primitives, including this one using nested cylinders. Most of the qcFX I did for VDMX are pretty old now. I really should revisit them, I think. I’m sure they need updating, and I’ve learnt a lot since then!