Scaffold-GS: Structured 3D Gaussians for View-Adaptive Rendering

Vanilla 3DGS can sprawl redundant Gaussians to overfit training views. Scaffold-GS places anchors on a sparse scaffold, spawns local neural Gaussians, and predicts their attributes from viewing direction and distance inside the frustum, with growing and pruning on anchors. At inference it activates anchors in view and filters trivial Gaussians, reporting compact storage and better behavior on specular, textureless, or wide-baseline settings at comparable FPS.