How to pose blend shapes 3D models for VRChat?

To pose blend shapes (shape keys) for VRChat 3D models, use Blender to adjust vertex positions, then map them to VRChat’s parameters via the Avatar Descriptor—this is the core workflow. Blend shapes control deformations like smiles or eyebrow raises; linking them to in-game sliders or visemes lets users trigger poses/expressions dynamically. For beginners, start with basic facial shapes (mouth, eyes) in Blender’s Shape Key Editor. Test early with the VRChat SDK to ensure your blend shapes work—this simplifies setup and avoids issues later.