# Revisit Consistency

The work introduces Honeycomb, a video world model built on HexMemory, a low-rank representation that stores scene features in a fixed-size memory of three spatial plus three spatiotemporal planes; a feed-forward writer maps each generated chunk into new plane features, warps the previous planes while preserving their dimensions, and fuses them via confidence-weighted pooling plus a learned residual correction, while a reader retrieves latents to condition subsequent generation; on WorldScore and RealEstate10K it reports stronger generation quality and revisit consistency with feature storage held constant throughout generation.

The work introduces Honeycomb, a video world model built on HexMemory, a low-rank representation that stores scene features in a fixed-size memory of three spatial plus three spatiotemporal planes; a feed-forward writer maps each generated chunk into new plane features, warps the previous planes while preserving their dimensions, and fuses them via confidence-weighted pooling plus a learned residual correction, while a reader retrieves latents to condition subsequent generation; on WorldScore and RealEstate10K it reports stronger generation quality and revisit consistency with feature storage held constant throughout generation.

LOCI introduces a hybrid spatial-memory architecture in which 15 of 30 transformer blocks keep a key-value cache of past observations while the other 15 are restricted to the current chunk and complemented by a recurrent linear-attention memory whose reads and writes are conditioned on projective camera geometry, with recurrent readouts flowing into subsequent cache-backed blocks to supply their queries with accumulated scene context; on the public MIND memory benchmark and on held-out recorded trajectories it reproduces revisited content more faithfully than representative world models and a same-recipe full-softmax model, lowers peak memory at equal length by about 30% with full history, and streams long videos at constant memory with a bounded bank of retained observations.

LOCI introduces a hybrid spatial-memory architecture in which 15 of 30 transformer blocks keep a key-value cache of past observations while the other 15 are restricted to the current chunk and complemented by a recurrent linear-attention memory whose reads and writes are conditioned on projective camera geometry, with recurrent readouts flowing into subsequent cache-backed blocks to supply their queries with accumulated scene context; on the public MIND memory benchmark and on held-out recorded trajectories it reproduces revisited content more faithfully than representative world models and a same-recipe full-softmax model, lowers peak memory at equal length by about 30% with full history, and streams long videos at constant memory with a bounded bank of retained observations.

Memorizon proposes a training recipe in which each scored chunk retrieves its own top-k latents by camera co-visibility and their union forms a bounded shared memory bank, so a training sample can cover a span of any length while the attention sequence stays bounded; revisit consistency improves on every split over a sliding-window baseline, and a span long enough to reach the first visit adds further gains at some cost in image quality.

Memorizon proposes a training recipe in which each scored chunk retrieves its own top-k latents by camera co-visibility and their union forms a bounded shared memory bank, so a training sample can cover a span of any length while the attention sequence stays bounded; revisit consistency improves on every split over a sliding-window baseline, and a span long enough to reach the first visit adds further gains at some cost in image quality.

The work introduces GEAR, which avoids fusing history into a persistent global 3D representation and instead uses per-frame geometry to build token-level history-to-target correspondences, treating geometry as an explicit address for visual memory; Geometric Correspondence Attention then sparsely injects only geometrically matched historical features, while an Invisible Octree rejects projectable but occluded correspondences, reporting state-of-the-art visual quality, camera control, and revisit consistency on DL3DV-Evaluation and WorldScore-Static and enabling minute-long generation.

The work introduces GEAR, which avoids fusing history into a persistent global 3D representation and instead uses per-frame geometry to build token-level history-to-target correspondences, treating geometry as an explicit address for visual memory; Geometric Correspondence Attention then sparsely injects only geometrically matched historical features, while an Invisible Octree rejects projectable but occluded correspondences, reporting state-of-the-art visual quality, camera control, and revisit consistency on DL3DV-Evaluation and WorldScore-Static and enabling minute-long generation.