BabaJ

Or maybe one could ‘fake’ it, by taking a painters approach.

Maybe I'm a bit naive…but at some point I was going to give it a try…so I don't know if it would work.

Layer volumes in planar cross sections with varying thicknesses.

Add to that the capacity to vary density with distance/position through volume wrangle.

Also, defining color/diffuse values.

Wouldn't work with the need to have ‘fly’ through at any viewing angle/position.

But perhaps could work with some limited ability to change viewer position from a landscape perspective.

Yes

Wrap two up as an asset?