I've been getting random crashes in an immersive RealityView, using model entities with physics. While the crashes do randomly happen with fewer objects, they can be reproduced consistently by placing 100 objects on top of each other. The project I used as a starter, is here : https://developer.apple.com/documentation/visionos/incorporating-real-world-surroundings-in-an-immersive-experience To reproduce the error, create 100 cubes in a loop on top of each other in addCube, instead of creating just 1. This gives exc_bad_access, as soon as the cubes are created. Tested on a Vision Pro, not a simulator. Any advice on how to resolve this? I'm trying to have around 100 objects moving around the environment, but it still gives exc_bad_access, eventually. I'm trying to attach the crash log, but I keep getting the error about sensitive materials. Testing to see if I can post without it.

I think it's kind of essential to have eye tracking data available to apps in VR mode (with the user's permission). The biggest problem I've observed is that Unity isn't able to implement dynamic foveated rendering without eye tracking data. Without the eye tracking it's only possible to have fixed foveated rendering. That gives a performance boost to rendering, but it also makes it so it gets blurry for the user if they look to the side without turning their head. I understand why it's a privacy issue to have apps tracking where the user is looking in the real world, but video passthrough is disabled in VR -- so it should be ok to enable eye tracking in VR (with the user's permission). Unity already supports dynamic foveated rendering (with eye tracking) for other VR headsets, and Vision Pro has the best eye tracking -- so Vision Pro should definitely have the best dynamic foveated rendering in VR.

[visionOS Question] I’m using the hierarchy of an entity loaded from a RealityKit Pro project to drive the content of a NavigationSplitView. I’d like to render any of the child entities in a RealityKitView in the detail pane when a user selects the child entity name from the list in the NavigationSplitView. I haven’t been able to render the entity in the detail view yet. I have tried updating the position/scaling to no avail. I also tried adding an AnchorEntity and set the child entity parent to it. I’m starting to suspect that the way to do it is to create a scene for each individual child entity in the RealityKit Pro project. I’d prefer to avoid this approach as I want a data-driven approach. Is there a way to implement my idea in RealityKit in code?

Im trying to use a RealityView with attachments and this error is being thowen. Am i using the RealityView wrong? I've seen other people use a RealityView with Attachments in visionOS... Please let this be a bug... RealityView { content, attachments in contentEntity = ModelEntity(mesh: .generatePlane(width: 0.3, height: 0.5)) content.add(contentEntity!) } attachments: { Text("Hello!") }.task { await loadImage() await runSession() await processImageTrackingUpdates() }

I am trying to verify my understanding of adding a HoverEffectComponent on entities inside a scene in RealityViews. Inside RealityComposer Pro, I have added the required Input Target and Collision components to one entity inside a node with multiple siblings, and left any options as defaults. They appear to create appropriately sized bounding boxes etc for these objects. In my RealityView I programmatically add the HoverEffectComponents to the entities as I don't see them in RCP. On device, this appears to "work" in the sense that when I gaze at the entity, it lights up - but so does every other entity in the scene - even those without Input Target and Collision components attached. Because the documentation on the components is sparse I am unsure if this is behavior as designed (e.g. all entities in that node are activated) or a bug or something in between. Has anyone encountered this and is there an appropriate way of setting these relationships up? Thanks

Hi, just generated a HDR10 MVHEVC file, mediainfo is below: Color range : Limited Color primaries : BT.2020 Transfer characteristics : PQ Matrix coefficients : BT.2020 non-constant Codec configuration box : hvcC+lhvC then generate the segment files with below command: mediafilesegmenter --iso-fragmented -t 4 -f av_1 av_new_1.mov then upload the segment files and prog_index.m3u8 to web server. just find that can not play the HLS stream on Safari... the url is http://ip/vod/prog_index.m3u8 just checked that if i remove the tag Transfer characteristics : PQ when generating the MVHEVC file. above same mediafilesegmenter command and upload the files to web server. the new version of HLS stream is can play on Safari... Is there any way to play HLS PQ video on Safari. thanks.

Hi all, I need some help debugging some code I wrote. Just as a preface, I'm an extremely new VR/AR developer and also very new to using ARKit + RealityKit. So please bear with me :) I'm just trying to make a simple program that will track an image and place an entity on it. The image is tracked correctly, but the moment the program recognizes the image and tries to place an entity on it, the program crashes. Here’s my code: VIEWMODEL CODE: Observable class ImageTrackingModel { var session = ARKitSession() // ARSession used to manage AR content var imageAnchors = [UUID: Bool]() // Tracks whether specific anchors have been processed var entityMap = [UUID: ModelEntity]() // Maps anchors to their corresponding ModelEntity var rootEntity = Entity() // Root entity to which all other entities are added let imageInfo = ImageTrackingProvider( referenceImages: ReferenceImage.loadReferenceImages(inGroupNamed: "referancePaper") ) init() { setupImageTracking() } func setupImageTracking() { if ImageTrackingProvider.isSupported { Task { try await session.run([imageInfo]) for await update in imageInfo.anchorUpdates { updateImage(update.anchor) } } } } func updateImage(_ anchor: ImageAnchor) { let entity = ModelEntity(mesh: .generateSphere(radius: 0.05)) // THIS IS WHERE THE CODE CRASHES if imageAnchors[anchor.id] == nil { rootEntity.addChild(entity) imageAnchors[anchor.id] = true print("Added new entity for anchor \(anchor.id)") } if anchor.isTracked { entity.transform = Transform(matrix: anchor.originFromAnchorTransform) print("Updated transform for anchor \(anchor.id)") } } } APP: @main struct MyApp: App { @State var session = ARKitSession() @State var immersionState: ImmersionStyle = .mixed private var viewModel = ImageTrackingModel() var body: some Scene { WindowGroup { ModeSelectView() } ImmersiveSpace(id: "appSpace") { ModeSelectView() } .immersionStyle(selection: $immersionState, in: .mixed) } } Content View: RealityView { content in Task { viewModel.setupImageTracking() } } //Im serioulsy so clueless on how to use this view

I just bought a Vision Pro to build and run my app on it, but I'm encountering this error from Xcode: Developer Mode is enabled. Computer is paired. Device is paired, and it's connected to my Mac via the Developer Strap. In the "VPN & Device Management" setting it says to navigate to, there is no "Developer App certificate". Others have suggested clearing the ModuleCache in DerivedData, but that's also been fruitless. I've cleaned the build multiple times, and restarted both devices, and Xcode. I have no idea what else I can possibly do to resolve this. Does anyone have any other ideas?

In visionOS. mix mode, I place a virtual object on the floor and a chair in front of it, but the chair does not obstruct the virtual object, making the effect unrealistic. How to make chairs and other objects in reality cover virtual objects

I'm trying to control the LOD of textures for an app for vision pro, With the default image node in composer pro the UV's are correct but the LOD is not what I want, I would like to have control over it. I see there is a node called "RealityKitTexture2DLOD" but as soon as I try to use that one the UV's are all messed up. Am I missing something ? Do we need to do something specific to use this node ? I tried to use the nodes "Place 2D" and "UsdTransform2d" but could not get the texture to align Any help appreciated

I'm unable to figure out how to know when my app no longer has focus. ScenePhase will only change when the WindowGroup gets created or closed. UIApplication.didBecomeActive and UIApplication.didEnterBackgroundNotification are not called either when say you move focus to Safari. What's the trick?

In SwiftUI, it looks like when a window is not in view its scene phase is set to ScenePhase.background after a minute or so. Now when every window of an app has been closed, the last window to be closed has its phase set to SchenePhase.background. This makes it quite difficult to differentiate reopening and app from a window that was out of view being glanced at again. I have tried implementing a solution where I count opened/closed window with an onChange that watches scenePhase, but it unfortunately looks like not every window closing gets detected (specifically if there are two windows, with one window is in the background, and the one active window is closed, its scene phase onChange is never triggered). Is there a better way to handle the case of differentiating between reopening an app with looking back at a suspended window that was never actually closed?

We have a random issue that when ARKitSession.run() is called, monitorSessionEvents() receives .paused and it never transitions to .running If we exit Immersive Space and do ARKitSesssion.run() again it works fine. Unfortunately this is very difficult to manage in the flow of our App.

I'm trying to implement the playback of an HLS content with FairPlay, and I want to insert it into a RealityView using a VideoMaterial of a sphere. When I use unencrypted HLS content everything works correctly, but when I use FairPlay it doesn't. To initialize FairPlay I am using the following in the view: let contentKeyDelegate = ContentKeySessionDelegate(licenseURL: licenseURL, certificateURL: certificateURL) // Create the Content Key Session using the FairPlay Streaming key system. let contentKeySession = AVContentKeySession(keySystem: .fairPlayStreaming) contentKeySession.setDelegate(contentKeyDelegate, queue: DispatchQueue.main) contentKeySession.addContentKeyRecipient(asset) Has anyone else encountered this problem? Note: I'm testing in Vision Pro directly because the simulator hasn't support for FairPlay.

When the dinosaur protrudes from the portal in the Encounter Dinosaurs app, it appears to be lit by the real room lighting, just like any other RealityKit content is by default. When the dinosaur is inside of the portal, it appears to be lit by the virtual environment, and the two light sources seem to be smoothly blended between at the plane of the portal. How is this done? ImageBasedLightReceiverComponent allows the IBL to be changed on a per-entity basis, but the actual lightning calculation shader code seems to be a black box, and I have not seen a way to specify which IBL texture is used on a per-fragment basis.

Hello, I would like to change the aspect (scale, texture, color) of a 3D element (Model Entity) when I hovered it with my eyes. What should I do If I want to create a request for this feature? And how would I know if it will ever be considered or when it will appear?

extension Entity { func addPanoramicImage(for media: WRMedia) { let subscription=TextureResource.loadAsync(named:"image_20240425_201630").sink( receiveCompletion: { switch $0 { case .finished: break case .failure(let error): assertionFailure("(error)") } }, receiveValue: { [weak self] texture in guard let self = self else { return } var material = UnlitMaterial() material.color = .init(texture: .init(texture)) self.components.set(ModelComponent( mesh: .generateSphere(radius: 1E3), materials: [material] )) self.scale *= .init(x: -1, y: 1, z: 1) self.transform.translation += SIMD3(0.0, -1, 0.0) } ) components.set(Entity.WRSubscribeComponent(subscription: subscription)) } problem: case .failure(let error): assertionFailure("(error)") Thread 1: Fatal error: Error Domain=MTKTextureLoaderErrorDomain Code=0 "Image decoding failed" UserInfo={NSLocalizedDescription=Image decoding failed, MTKTextureLoaderErrorKey=Image decoding failed}

I can't find a way to download a USDZ at runtime and load it into a Reality View with Reality kit. As an example, imagine downloading one of the 3D models from this Apple Developer page: https://developer.apple.com/augmented-reality/quick-look/ I think the process should be: Download the file from the web and store in temporary storage with the FileManager API Load the entity from the temp file location using Entity.init (I believe Entity.load is being deprecated in Swift 6 - throws up compiler warning) - https://developer.apple.com/documentation/realitykit/loading-entities-from-a-file Add the entity to content in the Reality View. I'm doing this at runtime on vision os in the simulator. I can get this to work with textures using slightly different APIs so I think the logic is sound but in that case I'm creating the entity with a mesh and material. Not sure if file size has an effect. Is there any official guidance or a code sample for this use case?