I have a suggestion for a LoRA:

"cutaway/cross section of a ________"

That could be a castle, a house, a space ship, or a cave... I have some example images, not really the best, but ok as a start:

https://imgur.com/a/Bxe3oSk

I have tried to use stable diffusion to make such an image, and it is very hard. I see this as a 2 separate tags:

"2d/flat" for the images where you are looking dead on, seeing only one wall of the building, maybe "orthographic"?

And 3d/perspective for the images where you see a building corner with 2 walls and then the cross section.