Has anybody watched the Light and Magic documentary on Disney+?
I'm halfway through the 6-episode series and it's superb. I've seen lots of making-of docs, but this story of ILM is really in-depth featuring interviews with George Lucas, John Dykstra, Richard Edlund, Denis Muren, Phil Tippet and pretty much every name you'll recognise from the film credits over the years.
And of course there's loads of footage from the 70s and 80s where these guys were working in the various wharehouses getting all the shots.