ArtiFixer from NVIDIA Research

ArtiFixer is NVIDIA's two-stage pipeline that enhances 3D reconstruction using auto-regressive diffusion models. Phase I finetunes a bidirectional video diffusion model with opacity mixing for consistency. Phase II distills it into a causal auto-regressive model generating hundreds of frames in one pass, producing plausible reconstructions where existing methods fail, outperforming baselines by 1–3 dB PSNR on benchmark datasets.