How to make impossible views in godot?

Hi,

What do you mean by "impossible views"?

Not exactly understand question.

Non-Euclidean space/geometry? This for a 2D or 3D game?

You could make the house interior a separate node that's hidden when you're outside the house, and visible when you're inside the house.

This project by io12 maybe be interesting to look at if you are looking to make non-euclidean worlds in 3D space:

https://github.com/io12/godot-portal-demo

Its a portal system, which would allow you to connect spaces together in a non-euclidean way.