It's good to know they care about optimization. I had the assumption that all CGI is a rather wasteful practice where you just throw more hardware at the problem.
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Hardware can be overloaded quickly if you don't care about it. You still need some engineering to keep everything under control.
I suspect this assumption come from the fact CGI have a lot of different things to render so you try to get the hardware that "support" by and large the problems you will have: You can't focus optimization on every single problem, but you can optimize the 90% use case, so the 10% use case can represent 90% of artist time and keep deadline safe.