[Refplace]

GURPS Powers Enhanced Senses adds some modifiers you might like.
What your trying to build here is a spatial sense right?
Even with the Sense of Perception modifier it wont see through objects, like walls but will around objects that totally dont block in my opinion.

Is it useful outside combat, like seeing extreme detail? I created a modifier for Clairsentience in GURPS Powers Totem and Nature Spirits that might be worth a look.