You seem to be superman - having developed this great program.

It seems like this feature is possible with some renderers (see https://blender.stackexchange.com/questions/150042/how-do-i-make-an-object-cast-shadows-but-be-invisible-in-the-render) -- but if it's not possible in this one, that's fine ...

It would be great if the root/second floor are invisible in aerial view but still somehow cast shadows based on light sources.

The goal would be to get an overhead view of what a floor would look like if you could somehow see through the celings (rather than the ceilings not being there). Like ...

Thanks. I've done basically this and can see the second floor when doing a virtual visit. The issue is when I'm viewing just the first floor from the overhead view and taking a photo, the second floor isn't rendered and therefore does not cast shadows.

Hello,

I'm wondering if it's possible to have certain interactions between the second floor and the first floor.
-- Lights from second floor visible when first floor is being rendered
-- Shadows cast from second floor being visible in first floor view

When taking a photo of the second floor, I ...