I don't know of a simple solution but the work around I use is to select the objects that you want to show as hidden and do a 3D view of them using the same 3D view you will be using as your final one. Marquee the objects and save to the clipboard and then copy them into the view you are trying to create. You can select all of the line and change them to dashed. If someone knows a better solution I would be happy to hear it.
Cheers,
Gerald Hoffman
“The simplification of anything is always sensational” GKC
Archicad 4.55 - 27-6000 USA
2019 MacBook Pro-macOS 15.0 (64GB w/ AMD Radeon Pro 5600M GPU)