Yeah, I know it's big.
It's a wedding, and lots of table proxy and plants are scattered around. Plus, it's a glass marque, so you need to see the park area around.
My 5950x ran at 30% because the virtualised RAM couldn't feed it data fast enough.
I've got 64GB of 3200 RAM, and Corona said it needs to virtualise another 120GB.
I don't think it's a matter of RAM though, as I managed to push through the problems in the end.
The renders seemed to work for the live preview some of the time, and some of the time, I had to switch to the production render.
I can't say I noticed a pattern to it. I rendered two views and then it would freak out. Another day I couldn't get one going.
The two attached visuals were really troublesome, despite using Corona scatter's "limit to viable area" option.