octree

Octrees as an Explicit 3D Languagearxiv.org

OctLLM treats 3D geometry as a sequence of octree occupancy tokens, using a Sparse Octree to keep sequences short while preserving shape. It adds lightweight 3D branches to a frozen vision‑language backbone, achieving state‑of‑the‑art image‑to‑3D generation with far fewer trainable parameters.