Alaya Lab & University of Tokyo · Compositional Worlds

WorldSculpt

Reconstructs cluttered scenes of hundreds of objects into complete per-object meshes from grounded video, rather than one fused mesh. It adapts a single-object generative prior, Pixal3D, with DINOv3 features lifted into a canonical voxel grid, a permutation-invariant aggregator and LoRA fine-tuning, then composes the per-object meshes rigidly into a scene. Introduces UE-MeshyScene, its own benchmark of six Unreal Engine 5.8 environments at 2560x1440 with hundreds of assets. Code and weights released; no licence stated and no numeric scores published on the page.