I have a realtime view into a room as a mask on a plane. All you can see of the room is through the mask /2D plane that is exported as a 3D model (.GLtf or .glb preferably)
I achieve this effect in Unity with masks, but I cant figure it out Blender... here is a video: https://youtu.be/jIz55M0uoqI
I am not rendering but exporting as a model that you rotate around like a 2D/3D playing card.
There is so much work being done now with masks in Blender I was hoping that something would be possible...
The other way to think about this might be to have a mirror that was reflecting a room in realtime but you would be hiding the room.
Any ideas?
Thanks ~be