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WorldTrace (Wu, Elflein et al., NVIDIA) is training-free: it argues stored KV entries become unreadable when rotary position offsets leave the training range, assigns each compressed summary a fixed in-distribution position, and keeps verbatim 'landmark' scene entries; its LoopBench revisits a starting scene along ABA, ABCA and ABCDA loops and scores the return frame against the earlier generated frame with CLIP similarity. Both report paper_result numbers only; SPMem ships Apache-labelled code and checkpoints, WorldTrace code was not found.","status":"active","body":{"text":"SPMem (Wu et al.) conditions a CogVideoX-based generator on three memories: recent frames, a static point cloud fused by TSDF from predicted point maps, and a few historical reference frames; its revisit test pairs frames at the same camera location in forward and reversed trajectories. WorldTrace (Wu, Elflein et al., NVIDIA) is training-free: it argues stored KV entries become unreadable when rotary position offsets leave the training range, assigns each compressed summary a fixed in-distribution position, and keeps verbatim 'landmark' scene entries; its LoopBench revisits a starting scene along ABA, ABCA and ABCDA loops and scores the return frame against the earlier generated frame with CLIP similarity. Both report paper_result numbers only; SPMem ships Apache-labelled code and checkpoints, WorldTrace code was not found.\n\nCurator qualifications: Excerpted evidence located (one excerpt-less row); headline +19.5% vs shrinking gains on 360-degree pan (0.577 vs 0.559) kept.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://arxiv.org/abs/2506.05284v1","note":"candidate evidence excerpts"},{"url":"https://github.com/spmem/spmem","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/abs/2608.07408v1","note":"candidate evidence excerpts"},{"url":"https://research.nvidia.com/labs/sil/projects/WorldTrace/","note":"candidate evidence excerpts"}]},"categories":["T06","T15","T18"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://arxiv.org/abs/2506.05284v1","claim":"SPMem (Wu et al.) conditions a CogVideoX-based generator on three memories: recent frames, a static point cloud fused by TSDF from predicted point maps, and a few historical reference frames; its revisit test pairs frames at the same camera location in forward and reversed trajectories. 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