blend shape animation realitykit
Asked on 06/30/2025
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Blend shape animation in RealityKit was discussed in the session titled "Compose interactive 3D content in Reality Composer Pro" at WWDC 2024. Blend shape animations allow for smooth transitions between different poses, creating lifelike movements. This technique is commonly used for animating a character's face or body by blending between a series of different shapes.
In the session, an example was provided where blend shape animation was used to animate plants from a wilted to a healthy state. The blend shape animation API consists of a blend shape weights mapping, a blend shape weights component, and two ways to execute the animations: procedurally or via USD animation. The blend shape weights mapping allows you to set a weight associated with a blend target, and you can set up blend targets on an entity with weights ranging from zero to one.
For more details, you can refer to the session Compose interactive 3D content in Reality Composer Pro (27:23).
Compose interactive 3D content in Reality Composer Pro
Discover how the Timeline view in Reality Composer Pro can bring your 3D content to life. Learn how to create an animated story in which characters and objects interact with each other and the world around them using inverse kinematics, blend shapes, and skeletal poses. We’ll also show you how to use built-in and custom actions, sequence your actions, apply triggers, and implement natural movements.
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