Surfing in the search of some tutorial for car modeling, no lucky search, but I find this video, posted 5 days ago I really don't know what is but seem an interesting solution for rendering.
https://vimeo.com/403521329

And here the link to the web, but in Japanese..
https://rd.cellgraphix.com/moi3d

And here the same thing for roket 3D https://rocket3f.com/bridges
Some one have more info on this command?