Zheng Zhang

Does the VGGT Family Need All Its Layers?

Which layers of a feed-forward geometry model are needed to preserve both camera poses and dense 3D structure? We study layer redundancy in VGGT, $\pi^3$, and VGGT-$\Omega$: 3,018 pruned configurations, scored on seven camera-pose and dense-geometry metrics across four indoor and outdoor datasets. Four findings follow:...