While fSpy is famous for matching perspective in eye-level shots (1-point/3-point perspective), it is equally powerful for top-down shots. However, raw top-down photos often contain slight perspective distortion (e.g., a table looks wider at the bottom of the frame). fSpy corrects this, allowing you to model blueprints, floor plans, or top-down props in 3ds Max with 1:1 scale accuracy.