Bridget Riley is an absolute master! I saw that exibit too and it actually got me into making generative art (Riley isn't generative art, but there's some obvious similarities).

I always found it fun that she really wasn't happy with how that 3d piece worked out, so went back to flat canvas for the rest of her career. I'm with you though, I thought it was amazing.

Here's a great documentary on Riley for anyone with BBC access: https://www.bbc.co.uk/iplayer/episode/m0011psx/bridget-riley...