# convertToAdditiveUsingRestPose() Converts animation to additive format by subtracting the skeleton’s rest pose. ``` static func convertToAdditiveUsingRestPose() -> SampledAnimation.SkeletalAnimationOperation ``` ## Return Value A [`SampledAnimation.SkeletalAnimationOperation`](/documentation/RealityKit/SampledAnimation/SkeletalAnimationOperation) that, when processed, produces a `SampledAnimation` in additive format. ## Discussion Creates a delta animation that represents the difference between this animation and the skeleton’s rest pose. Requires a skeleton to be provided to [`processAndCreateAnimation(for:operations:name:)`](/documentation/RealityKit/SampledAnimation/processAndCreateAnimation(for:operations:name:)). --- 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)