Hello, PhysicallyBasedMaterial in RealityKit 2 contains a blending property to adjust the transparency of a material. Is there a way to animate this over time to fade entities in and out? I've tried the new FromToByAnimation API but could not figure out if there is a supported BindPath for the transparency. Ideally what I would like to achieve is something similar to SceneKits SCNAction.fadeIn(duration: …) which also worked on a whole node. I figured I could also go the route of a custom fragment shader here, though that seems overkill. As RealityComposer also supports fade actions I would assume that this is at least supported behind the scenes. Thanks for any help!

I've just implemented some necessary fixes to our app to ensure compatibility with iOS 15 and ARKit 2. Now when I deploy the app via XCode 13 RC (Version 13.0 (13A233)) I get the following crash right at launch: dyld: Library not loaded: /System/Library/Frameworks/RealityFoundation.framework/RealityFoundation   Referenced from: /private/var/containers/Bundle/Application/…   Reason: image not found dyld: launch, loading dependent libraries DYLD_LIBRARY_PATH=/usr/lib/system/introspection DYLD_INSERT_LIBRARIES=/Developer/usr/lib/libBacktraceRecording.dylib:/Developer/usr/lib/libMainThreadChecker.dylib:/Developer/Library/PrivateFrameworks/DTDDISupport.framework/libViewDebuggerSupport.dylib Is this a known issue? I've already tried deleting Derived Data and clearing the project but the problem persists. The minimum deployment target is iOS 13 for the main app and iOS 14 for the AppClip. All iOS 15 related fixes are wrapped into if #available(iOS 15.0, *) { … } This is a pretty major problem for us as we now can't send out Testflights or upload to AppStoreConnect for Monday. Thanks!

Hello, in our app we are downloading some user generated content (.reality files and USDZs) and displaying it within the app. This worked without issues in iOS 14 but with iOS 15 (release version) there have been a lot of issues with certain .reality files. As far as I can see USDZ files still work. I've created a little test project and the error message log is not really helpful. 2021-10-01 19:42:30.207645+0100 RealityKitAssetTest-iOS15[3239:827718] [Assets] Failed to load asset of type 'RealityFileAsset', error:Could not find archive entry named assets/Scéna17_9dfa3d0.compiledscene. 2021-10-01 19:42:30.208097+0100 RealityKitAssetTest-iOS15[3239:827598] [Assets] Failed to load asset path '#18094855536753608259' 2021-10-01 19:42:30.208117+0100 RealityKitAssetTest-iOS15[3239:827598] [Assets] AssetLoadRequest failed because asset failed to load '#18094855536753608259' 2021-10-01 19:42:30.307040+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.307608+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.307712+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.307753+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.307790+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.307907+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.307955+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.308155+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 2021-10-01 19:42:30.308194+0100 RealityKitAssetTest-iOS15[3239:827598] throwing -10878 ▿ Failed to load loadRequest.   - generic: "Failed to load loadRequest." Basic code structure that is used for loading: cancellable = Entity.loadAsync(named: entityName, in: .main)     .sink { completion in         switch completion {         case .failure(let error):             dump(error)             print("Done")         case .finished:             print("Finished loading")         }     } receiveValue: { entity in         print("Entity: \(entity)")     } Is there anyway to force it to load in a mode that enforces compatibility? As mentioned this only happens on iOS 15. Even ARQuickLook can't display the files anymore (no issues on iOS 14). Thanks for any help!

Hello, is there a recommended way to render Menu items, e.g in a SwiftUI ContextMenu with icon (SFSymbols)? Let's say I have the following setup: Both buttons render fine on native macOS (e.g Sonoma) but Catalyst refuses to render the symbol at all. I tried every possible combination I could think off. The only way I found was to directly copy and paste a symbol from the SF symbols app and inline it with the label string as unicode. Unfortunately I have a couple custom SF symbols so this isn't really an option for me. I feel like this is a perfectly valid usecase, as it makes the menu visually a lot easier scannable. With UIKit and Ventura this at least worked for Menubar items but now also seems broken on Sonoma. I would greatly appreciate any hints. Thanks!

HoverEffectComponent on macOS 15 and iOS 18 works fine using RealityView, but seems to be ignored when ARView (even with a SwiftUI UIViewRepresentable) is used. Feedback ID: FB15080805

Hi, I have a RealityKit app that I am building with Xcode 16. The app has a minimum deployment target of iOS 17. If I run it on an iOS 17 device the app crashes: dyld[15716]: Symbol not found: _$s10RealityKit13ShapeResourceC14generateConvex4fromAcA04MeshD0C_tYaKFZ Referenced from: … Expected in: …/System/Library/Frameworks/RealityFoundation.framework/RealityFoundation My code looks something like this: @available(iOS, introduced: 13.0, obsoleted: 18.0) @MainActor @preconcurrency func generateNonAsyncConvexShapeResource(from meshResource: MeshResource) throws -> ShapeResource { ShapeResource.generateConvex(from: meshResource) } @available(iOS 18.0, *) func generateConvexShapeAsync(from meshResource: MeshResource) async throws -> ShapeResource { // This will only be available for iOS 18 and above return try await ShapeResource.generateConvex(from: meshResource) } if let meshResource = try? modelEntity.model?.mesh.applying(transform: transform.matrix) { if #available(visionOS 1.0, iOS 18.0, *) { try? await generateConvexShapeAsync(from: meshResource)// await shapeResources.append(.generateConvex(from: meshResource)) } else { try? generateNonAsyncConvexShapeResource(from: meshResource) } } So I actually do check for the system and only call the async variant on iOS 18. Any hints how to fix that? Thanks!

Hi, since RealityKit 4 now supports Blend Shapes I was wondering if there are any workflow or tooling recommendations to bake/export them into a USDZ. Are Blender or Cinema4D capable to do that out of the box? Should we look into NVIDIA omniverse (https://docs.omniverse.nvidia.com/connect/latest/blender/manual.htm) So far this topic seems very sparsely documented and I would appreciate any hints. Thank you!

Hello, given this following simple SwiftUI setup: struct ContentView: View { var body: some View { CustomFocusView() } } struct CustomFocusView: View { @FocusState private var isFocused: Bool var body: some View { color .frame(width: 128, height: 128) .focusable(true) .focused($isFocused) .onTapGesture { isFocused.toggle() } .onKeyPress("a") { print("A pressed") return .handled } } var color: Color { isFocused ? .blue : .red } } If I run this via Mac – Designed for iPad, the CustomFocusView toggles focus as expected and cycles through red and blue. Now if I run this same exact code via Mac Catalyst absolutely nothing happens and so far I wasn't able to ever get this view to accept focused state. Is this expected? I would appreciate if anyone could hint me on how to get this working. Thank and best regards!

Hello, we have a RealityKit app that also runs on macOS via Catalyst. For specific USD assets containing particle systems we have observed a reproducible crash. Steps to reproduce: Open Reality Composer Pro Create new file Create simple particle system (default one is fine) export as USDZ Create project in Xcode Call Entity.load(… and pass in your USD Running this on an Intel iMac with macOS Sequoia 15.3 will lead to a crash with the following console log: validateWithDevice:4704: failed assertion `Render Pipeline DescrvalidateWithDevice:4704: failed assertion `Render Pipeline Descriptor Validation depthAttachmentPixelFormat (MTLPixelFormatDepthvalidateWithDevice:4704: failed assertion `Render Pipeline Descriptor Validation depthAttachmentPixelFormat (MTLPixelFormatDepthvalidateWithDevice:4704: failed assertion `Render Pipeline Descriptor Validation depthAttachmentPixelFormat (MTLPixelFormatDepth32Float) and stencilAttachmentPixelFormat (MTLPixelFormatStencil8) must match. ' iptor Validation depthAttachmentPixelFormat (MTLPixelFormatDepth32Float) and stencilAttachmentPixelFormat (MTLPixelFormatStencil8) must match. ' 32Float) and stencilAttachmentPixelFormat (MTLPixelFormatStencil32Float) and stencilAttachmentPixelFormat (MTLPixelFormatStencil8) must match. ' 8) must match. ' Xcode version: 16.2.0 iMac 2020 3,8GHz Intel Core i7 macOS Sequoia 15.3 FB16477373 It would be great if this could be fixed quickly or a workaround provided since it affects or production app. Thank you!

Hi, I have a NSToolbar in my Mac Catalyst app with a space and flexible space item in it (https://developer.apple.com/documentation/appkit/nstoolbaritem/identifier/space). On macOS Tahoe the space item is being rendered with a Liquid Glass effect and seems to be automatically grouped with the previous item. Is there a way to prevent this? It basically adds some undesired padding next to the previous item and looks add. The flexible space is rendered normally and as before. I am talking about the space right next to the back chevron item. Thanks for any hints!

Hi, since iOS 15 I've repeatedly noticed the console warning »ARSessionDelegate is retaining X ARFrames. This can lead to future camera frames being dropped« even for rather simple projects using RealityKit and ARKit. Could someone from the ARKit team please elaborate what causes this warning and what can be done to avoid it? If I remember correctly I didn't even assign an ARSessionDelegate. Thank you!

Hello, I have a macOS Catalyst app that I now began updating and building against the iOS 18/macOS Sequoia SDKs. Most things appear to be working just fine as before, apart from my NSToolbar. At the root of my app I am presenting a UISplitViewController which gets a custom SidebarViewController and a UITabBarController as its viewControllers. Then at same point in the apps lifecycle the UITabBarController presents another ViewController modally. I then associate the controllers window with a custom NSToolbar like this: let toolbar = NSToolbar(identifier: "mainToolbar") toolbar.displayMode = .iconAndLabel toolbar.delegate = self toolbar.allowsUserCustomization = false titleBar.toolbarStyle = .automatic titleBar.titleVisibility = .hidden titleBar.toolbar = toolbar I also disable automatic NSToolbar hosting via: https://developer.apple.com/documentation/uikit/uinavigationbardelegate/3987959-navigationbarnstoolbarsection (returning .none). Now all of this worked fine on macOS Sonoma and previous versions but on Sequoia my custom toolbar refuses to show up. My suspicion is that is has something to do with the new tab and sidebar behaviour introduced with the new SDKs (https://developer.apple.com/documentation/uikit/uinavigationbardelegate/3987959-navigationbarnstoolbarsection). For now within my UITabBarController I was able to revert to the old look using: if #available(iOS 18.0, *) { mode = .tabSidebar sidebar.isHidden = true isTabBarHidden = true } This result in a look similar to the previous macOS version but my NSToolbar unfortunately remains hidden. Is there an easy fix for this? Since I am a solo developer I would prefer to spend my available resources currently on other features and adopt the new tab/sidebars a couple months down the line. Appreciate any help and hints, thanks! There used to be a toolbar here on the right side. ↑

The ShaderGraph Node Blurred Background (RealityKit) – https://developer.apple.com/documentation/shadergraph/realitykit/blurred-background-(realitykit) works fine within the RealityComposer Pro 2 editor but isn't working on iOS 18 or macOS 15. Instead of the blurred content it just renders as opaque in a single color (Screenshot 2). Interestingly it also fails to render within RealityComposer Pro when no other entities are within the scene, e.g only a background skybox set. Expected Behavior: It would be great if this node worked the same way as it does on visionOS since this would allow for really interesting and nice effects for scenes. Feedback ID: FB15081190

A ShaderGraphMaterial with an Occlusion Surface Output generated with RealityComposer 2 fails to load on iOS 18 and macOS 15 with the following error: RealityFoundation.ShaderGraphMaterial.LoadError.invalidTypeFound (https://developer.apple.com/documentation/realitykit/shadergraphmaterial/loaderror/invalidtypefound) This happens with both https://developer.apple.com/documentation/shadergraph/realitykit/occlusion-surface-(realitykit) and https://developer.apple.com/documentation/shadergraph/realitykit/shadow-receiving-occlusion-surface-(realitykit) RealityView { content in do { let bgEntity = ModelEntity(mesh: .generateCone(height: 0.5, radius: 0.1), materials: [SimpleMaterial(color: .red, isMetallic: true)]) bgEntity.position.z = -0.2 content.add(bgEntity) let occlusionMaterial = try await ShaderGraphMaterial(named: "/Root/OcclusionMaterial", from: "OcclusionMaterial") let testEntity = ModelEntity(mesh: .generateSphere(radius: 0.4), materials: [occlusionMaterial]) content.add(testEntity) content.cameraTarget = testEntity } catch { print("Shader Graph Load Error:") dump(error) } } .realityViewCameraControls(.orbit) .edgesIgnoringSafeArea(.all) Feedback ID: FB15081296

Devices running iOS 18 using RealityKit do not seem to receive lighting supplied via ARKit Environment Texturing (https://developer.apple.com/documentation/arkit/arworldtrackingconfiguration/2977509-environmenttexturing). Instead just a default IBL is used by RealityKit. This happens with RealityView as well as ARView. It also happens when I explicitly opt-in to environment texturing: let worldTrackingConfig = ARWorldTrackingConfiguration() worldTrackingConfig.environmentTexturing = .automatic arView.session.run(worldTrackingConfig) Even the Xcode AR Template has this issue. I'm attaching a screenshot of the sample app running on iOS 18 where it's broken and from iOS 17 where it works as expected. I hope this can get resolved quickly since I see it as a major regression. Feedback ID: FB15091335 UPDATE: It works on my older iPhone XS (iOS 18 22A5282m) Broken on iPad Pro (11-inch) (3rd generation) (iPadOS 18.0 (22A5350a)) Maybe it's related to LiDAR? Thank you! iOS 17 (works): iOS 18 (broken):