TRELLIS.2-4B

Microsoft 4B-parameter image-to-3D flow-matching transformer. Generates textured PBR-ready meshes (base color, roughness, metallic, opacity) at voxel-grid resolutions from 512^3 up to 1536^3 from a single input image. Uses a novel O-Voxel sparse voxel representation that handles open surfaces, non-manifold geometry, and transparency.