# USDPlayer.DeformationData.BlendShapeData Blend shape targets and weights for morph-target deformation. ``` struct BlendShapeData ``` ## Topics ### Structures [`struct Update`](/documentation/USDKit/USDPlayer/DeformationData/BlendShapeData/Update) Delta update carrying only the blend shape fields that changed since the last frame. ### Instance Properties [`let positionOffsets: [[SIMD3]]`](/documentation/USDKit/USDPlayer/DeformationData/BlendShapeData/positionOffsets) Per-vertex position delta vectors for each blend shape target. [`let weights: [Float]`](/documentation/USDKit/USDPlayer/DeformationData/BlendShapeData/weights) Weight values controlling each blend shape target’s influence. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)