Hunyuan 3D 3.1 (Pro) prioritizes geometric detail through a 10B parameter hierarchical Diffusion Transformer (3D-DiT) architecture. It utilizes a carving process that blocks out global forms before refining surfaces to a 1536³ voxel resolution. Compared to 3.0, version 3.1 features improved texture color reproduction that effectively handles lighting interference on material colors. It supports a face count slider ranging from 50k to 1.5M polygons and generates 4K PBR textures with fine-grained bump mapping. The model captures complex occluded areas and sharp edge details. Generation takes several minutes.