China's AI 3D model Hi3D V1.0 goes open source, releasing weights and inference code

China's AI 3D creation platform Hi3D has announced the open-sourcing of the V1.0 model weights and inference code, with the resources now available on GitHub and Hugging Face. The model is based on the Sparc3D architecture, and its training data has been expanded from about 500,000 to about 2 million curated 3D assets. It supports an effective sparse grid resolution of up to 1536³ and takes a reference image and a coarse mesh as input to progressively refine the geometric structure, but it outputs only the geometric model and does not generate textures, materials, or vertex colors. V1.0 uses a custom license agreement: upon exceeding 200,000 monthly active users or reaching US$1 million in monthly revenue, the licensee must notify the licensor within 60 days and apply for a separate written authorization.