This question is about USD animations playing correctly in macOS Preview but not with RealityKit on visionOS. I have a USD file created with 3D Studio Max that contains mesh-based smoke animation: https://drive.google.com/file/d/1L7Jophgvw0u0USSv-_0fPGuCuJtapmzo/view (5.6 MB) Apple's macOS 14.5 Preview app is able to play the animation correctly: However, when a visionOS app uses RealityKit to load that same USD file in visionOS 2.0 beta 4, built with 16.0 beta 3 (16A5202i), and Entity/playAnimation is called, the animation does not play as expected: This same app is able to successfully play animation of a hierarchy of solid objects read from a different USD file. When I inspect the RealityKit entities loaded from the USD file, the ground plane entity is a ModelEntity, as expected, but the smoke entity type is Entity, with no associated geometry. Why is it that macOS Preview can play the animation in the file, but RealityKit cannot? Thank you for considering this question.

Does visionOS 2 still prompt the user with a permission alert when a full immersive space is presented? In visionOS 1, the first time an app presented an immersive space, the user was prompted with an alert to grant permission. openImmersiveSpace would return an error code if the user opted not to grant permission. In visionOS 1, it was important to handle this case correctly. In visionOS 1, the Settings > Developer menu had an option to reset the immersive user's space permission prompting state so developers could test this interaction flow. In visionOS 2, I no longer see the full immersive space permissions alert. I can't remember if I saw it once, the first time visionOS 2.0 beta was installed, or if I never saw it at all. The Settings > Developer menu no longer has an option to reset the permission prompting state. I can't find any way to test the interaction flow in my app to make sure that it will work correctly for users. Does visionOS 2 no longer ask for full immersive space permission at all? I can't find this change documented anywhere. If visionOS 2 does prompt the user for permission, is there any way to reproduce and test this interaction flow so I can make sure my app handles it correctly? Thanks for taking the time to answer this question.

The WWDC24 video "Build a spatial drawing app with RealityKit" https://developer.apple.com/wwdc24/10104 at 12:04 includes a slide showing a Reality Composer Pro shader graph that features wonderful inline documentation comment boxes: Are shader graph inline comments a new feature that Reality Composer Pro supports? This would be extraordinarily useful, as complex shader graphs can be challenging to decipher. If so, how are inline shader graph comments created in Reality Composer Pro?

In RealityKit in visionOS 1.0 I'm perplexed that PhysicallyBasedMaterial and CustomMaterial have faceCulling properties but ShaderGraphMaterial does not. Is there some way to achieve front face culling in a shader graph without creating a separate mesh with reversed triangle vertex indices?

Hey everybody! Does anyone know if there's a UIKit API that's equivalent to SwiftUI's View/offset(z:)? https://developer.apple.com/documentation/swiftui/view/offset(z:) I'd like to translate a UIView forward in space a little bit on visionOS. ❤️

In visionOS, is there a way to temporarily hide the window close/position handle at the bottom of a window? The Safari app does this, so it must be possible.

My visionOS app has a RealityView with an attachment containing SwiftUI controls, and occasionally the controls in the attachment don't respond to user interaction. Is this a known issue? Is there a workaround? Are RealityView attachments only intended to be output only? Using visionOS 1.0 beta 3 (Xcode 15 beta 8), I've reproduced this problem with a small standalone Xcode project. I submitted the issue as FB13143132 with lovingly hand-crafted artisan repro steps. The Xcode project is also available at https://github.com/drewolbrich/AttachmentControls Thank you for investigating this issue. Screenshot my use case:

I am creating an AR app that uses ARKit and SceneKit. Will visionOS support SceneKit AR applications, or will I have to rewrite my app using RealityKit? Thanks for answering my question. : - )

Will visionOS support SceneKit?