Mesh conversion tool released for 3D generative AI outputs

Generative 3D models like InstantMesh mainly store color information using the vertex color method, but most 3D applications prefer the UV-mapped textured mesh format.

This article explains InstantTexture, an open-source library that converts vertex color meshes into UV-mapped textured meshes, along with its technical principles.

Main conversion process:

• UV map generation: Uses the xatlas library to generate the UV map of the mesh.
• Data remapping: Rearranges the vertices and vertex colors according to the generated UV map.
• Texture filling: Uses Barycentric interpolation to calculate the colors inside triangles and precisely writes them into the texture buffer.

Users can simply perform the conversion via pip install InstantTexture, allowing 3D models created with generative AI to be immediately utilized in various graphics engines.