Did a quick test, and it looked ok. Let me know if you need a copy of my test file. ok

Many thanks, and it worked. Just for comparison:

My way (bitmap boxes): https://www.youtube.com/watch?v=cWVXMxhASkk

Your way (transparent flat boxes): https://www.youtube.com/watch?v=_MyGGdWQdTE

The transparent boxes are much better. I also went with a circular room to avoid shooting sculptures from the wrong direction.