Actually, i'm a bit of a Luddite, having a computer in my home only every other year.
But, noting the question of matte paintings, Kodak's new 100asa 5247 was so sensitive to green that Joe Johnston had to stay up nights for weeks re-painting Harrison Ellenshaw's 3'x5' glass-work, way over into the pinks to get a useful element to composite many of the painted matts. Tatooine and the top of the sand crawler were very reddish anyway.
ILM traded Disney a "engineering walk-through", in exchange they fixedreplaced our live worm brigade under the same Landspeeder driving in town.
By 1979 Disney had THEIR motion control track system, "ACES?".
Built into a concrete trench, massive and grey like a Navy shell loader, they had used the godawful Nazi "Askania" eight perf film movement; sprocket pulldown plus registration pins.... with a 13 frame registration error cycle. HaHa.
George put their fix, and a completely new audio & ADR soundtrack into that summers 35mm release.
Anyway, for a larger dose than i have, see