Here’s a test I did, using imposters as volumes (kind of like how Phoenix FD makes viewport realtime feedback possible?)
Phoenix FD (inspiration)
My Imposter:
It has some glitchies right now, but crazy cheap volumes 
Amazing work! Would you like to share more info on how you developed this?
This is incredible. Really hope you release more info about this soon.
Well Ryan Brooks did most of the work 
i just fiddled with the shader a bit 
I planned on doing some blurring of the textures to get the soft edges, but the mesh distance fields does that for you when you shift from masked to translucent blend mode. I still havn’t figured out how to get the baked material to work without being a LOD though. When I apply the baked material with the baked texture to a plane it just becomes invisible
Crazy cheap AND more art directable than the fancy raymarching stuff. Awesome work!