Hiya!
Well, it's been over a year. No export. :( That's ok, still a WONDERFUL program to play with! :)
HOWEVER... ;) ...the whole "polygon count / file size" argument is now moot in regards to Unreal Engine 5. If I can have a scene consisting of several BILLION polygons, all with full textures and real-time global illumination.... exporting a scene from Flowscape is a no brainer.
Just do that and let everyone else deal with exporting from UE5 to whatever they want (UE5 is free). I could, if so inclined, export from FS, import to UE5, then export from UE5 into .fbx, for example.
So...I guess the balls back in Flowscapes court again. ;)