RealityKit doesn't currently support blendshapes which is stated here: https://developer.apple.com/documentation/realitykit/validating-usd-files#Review-skeletons Currently, it would only be possible to either use a custom geometry modifier to apply the vertex offsets interpolated over time through set_model_position_update or using a MeshResource update routine to transform the vertices. Most of my animations are procedural, so I haven't yet tried to get the blendshape offsets and weights from the USD file, which would then need to be uploaded through a uniform. There doesn't seem to have any exposed getter akin to jointTranforms. https://developer.apple.com/documentation/realitykit/altering_realitykit_rendering_with_shader_functions https://developer.apple.com/documentation/realitykit/modifying-realitykit-rendering-using-custom-materials#Write-a-Geometry-Modifier https://developer.apple.com/videos/play/wwdc2021/10075 https://developer.apple.com/documentation/visionos/diorama