UniQueR: Unified Query-based Feedforward 3D Reconstruction
Reframes feedforward reconstruction from per-pixel 2.5D prediction to inference over a sparse set of 3D queries. Because queries live in global 3D space rather than in any single frame camera space, they can place Gaussians in regions never observed. By default 4096 queries spawn 64 Gaussians each, about 260K primitives, an order of magnitude fewer than per-pixel methods. On Mip-NeRF 360 with three views it reaches 22.70 PSNR (AnySplat 20.08) in a 0.213 s forward pass; at 32 views it uses 15x fewer primitives, 40 percent less memory and improves depth abs-rel from 0.062 to 0.038. In the dense regime feedforward-only quality trails AnySplat, but as initialization for per-scene optimization it overtakes it (25.14 vs 24.99 PSNR). No public code; not reproduced.
