Astral temples can be complex with many rooms and detailed corridors as it grows, or it can be a simple 2-4 room that branch out of a center, mine used to have a tree in the middle and four rooms spread in cardinal directions each with a given purpose. These days i'm out of touch with it and would need to rebuild it because if you don't keep an active practice it will crumble in your memory.
Studies outside of the occult in mathematics/physics field led me to the understanding of non-euclidean geometry and i'm always trying to bridge math and magic like many thinkers of the past. It seems back in the day these fields were more closely tied to each other up to Reinassence with John Dee, i feel that in past centuries mathematicians have distanced themselves from interest in philosophy while philosophers are separated from thinking with numbers by modern structure of scholarly teaching
What any of this has to do with astral temples and our discussion? Temples don't need to follow euclidean logic, you could have a 3-room structure that as you walk by it has perceived 4 spaces instead of 3, at the same time you could have a door connected to the other side of the building and not linear doors as we have in our physical homes, its quite interesting to think about and this thread lead me to go back at it trying to build a temple from a non-euclidean perspective!
Corridors that shrink you to enter rat holes with giant structures inside, infinite possibilities that defy the superficial space, of course you could have a "mansion scaled temple" that extends to infinity and you walk or teleport around it, but breaking euclidean laws you can cram more information in less space!