# init(_:) Creates an instance that type-erases [`AttachmentContent`](/documentation/RealityKit/AttachmentContent). ``` @MainActor @preconcurrency init(_ content: Content) where Content : AttachmentContent ``` --- 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)