If we can't have an export option, maybe the option to have multiple imports would be possible? I do my character modeling in Daz3D (which can get hideously expensive), and then export them into FlowScape...
BUT! If I want to have multiple figures in a scene (or even other props/scenic pieces) I have to set them up in Daz (guessing at their locations & heights relative to a central point), and then export them to a format FlowScape can import. This can create a problem with file sizes and crashing my laptop (which isn't really up to spec for top-end 3D work).
However, I do LOVE FlowScape, and appreciate that adding features takes time, especially to keep the entire project stable.