Yup, but in these cases, the location is purely digital, and freeform, thus allowing any angle, time period, and motion previously unheardof before 1998-1999.

SUPER-high detail is not needed in most cases, as the background is mostly out of focus, so the remaining issue would only be forground action match-lighting.

However that problem is solved by the use of this same environ as the HDRI sequence, reverse-mapped, or lit onto the focused action.

The benefits are low-overhead in terms of production costs, plus a bonus of a readily available, affordable, customizable location for day or night shots.

So, as long as your live action is tracked in some way to give you acurate-enough camera motion data, or even not-so-acurate, that data can then be applied to a camera inside this environment, and you've got a SUPER-CHEAP, SUPER-FAST rendering, variably-detailed, freeform background plate automaticly.

Even though I LOVE photogrammetry, I still miss the "crafty".

("crafty" is short for location craft-services.
, i.e, the free food truck hehe...

Great job Carrot, can't wait to see this bg in action bud!