Hi, I'm trying to understand how I can get 3- or 4-channel per-vertex data into the Graph Editor. From my tests, it seems that: the "Geometric Property" node does not give access to 4-channel data, "Geometric Property (vector3)" does not give me access to custom properties besides the ones defined in MaterialX core the "Texture Coordinates" node has a vector4f mode (yay!), but according to MaterialX spec, texcoords must have 2 or 3 channels, and I can't get 4-channel data to show up there either. My assumption so far is that I must be missing some "magic" – for example, do the primvars in a file have to be in a specific order, independent of their names? Or do their names matter? (E.g. convention would be primars:st and primvars:st1 and so on) Unfortunately the forum doesn't allow me to attach any USDZ or ZIP files or GDrive links; if there's a way to share a test file I'm happy to do so!

If I import a USDZ model with blendMode set to alpha, occlusion does not work on iPhone with iOS 18. How should transparent materials and occlusion be properly used in the new RealityKit? Additionally, new artifacts have appeared when working with transparent objects overlapping each other. The transparency results do not blend but rather parts of the model just not rendering.

Hi, I am trying to use PhotogrammetrySample input sequence according to the WWDC video. I modified only the following code in the sample: var images = try FileManager.default.contentsOfDirectory(at: captureFolderManager.imagesFolder, includingPropertiesForKeys: nil, options: .skipsHiddenFiles) let inputSequence = images.lazy.compactMap { file in return self.loadSampleAndMask(file: file) } // Next line causes the exception photogrammetrySession = try PhotogrammetrySession( input: inputSequence, configuration: configuration) private func loadSampleAndMask(file: URL) -> PhotogrammetrySample? { do { var sample = try PhotogrammetrySample(contentsOf: file) return sample } catch { return nil } } I am getting following runtime error: Thread 1: EXC_BREAKPOINT (code=1, subcode=0x240d88904)

I have an app which have an Immersive Space view and it needs the user to have a button in the bottom which have a fixed place in front of the user head like a dashboard in game or so but when the user get too close to any3d object in the view it could cover the button and make it inaccessible and it mainly would prevent the app for being approved like that in appstoreconnect I was working before on SceneKit and there was something like camera view Znear and Zfar which decide when to hide the 3d model if it comes too close or gets too far and I wonder if there is something like that in realityView / RealityKit 4. Here is My Code and the screenshots follows import SwiftUI import RealityKit struct ContentView: View { @State var myHead: Entity = { let headAnchor = AnchorEntity(.head) headAnchor.position = [-0.02, -0.023, -0.24] return headAnchor }() @State var clicked = false var body: some View { RealityView { content, attachments in // create a 3d box let mainBox = ModelEntity(mesh: .generateBox(size: [0.1, 0.1, 0.1])) mainBox.position = [0, 1.6, -0.3] content.add(mainBox) content.add(myHead) guard let attachmentEntity = attachments.entity(for: "Dashboard") else {return} myHead.addChild(attachmentEntity) } attachments: { // SwiftUI Inside Immersivre View Attachment(id: "Dashboard") { VStack { Spacer() .frame(height: 300) Button(action: { goClicked() }) { Text(clicked ? "⏸️" : "▶️") .frame(maxWidth: 48, maxHeight: 48, alignment: .center) .font(.extraLargeTitle) } .buttonStyle(.plain) } } } } func goClicked() { clicked.toggle() } }

Apple's own USDZ files from their website does not display properly both in OPReview and in Keynote when imported. It displays properly, however, in Reality Converter bit with this error: "Invalid USD shader node in USD file Shader nodes must have “id” as the implementationSource, with id values that begin with “Usd”. Also, shader inputs with connections must each have a single, valid connection source." I tried importing other models from external sources and they work without any issue at all. Is there any potential fix or workaround this? Thanks in advance.

I am unable to get VisionOS 2.0 (simulator) to receive the GCControllerDidConnect notification and thus am unable to setup support for a gamepad. However, it works in VisionOS 1.2. For VisionOS 2.0 I've tried adding: .handlesGameControllerEvents(matching: .gamepad) attribute to the view Supports Controller User Interaction to Info.plist Supported game controller types -> Extended Gamepad to Info.plist ...but the notification still doesn't fire. It does when the code is run from VisionOS 1.2 simulator, both of which have the Send Game Controller To Device option enabled. Here is the example code. It's based on the Xcode project template. The only files updated were ImmersiveView.swift and Info.plist, as detailed above: import SwiftUI import GameController import RealityKit import RealityKitContent struct ImmersiveView: View { var body: some View { RealityView { content in // Add the initial RealityKit content if let immersiveContentEntity = try? await Entity(named: "Immersive", in: realityKitContentBundle) { content.add(immersiveContentEntity) } NotificationCenter.default.addObserver( forName: NSNotification.Name.GCControllerDidConnect, object: nil, queue: nil) { _ in print("Handling GCControllerDidConnect notification") } } .modify { if #available(visionOS 2.0, *) { $0.handlesGameControllerEvents(matching: .gamepad) } else { $0 } } } } extension View { func modify<T: View>(@ViewBuilder _ modifier: (Self) -> T) -> some View { return modifier(self) } }

Hi I have setup animation using timeline in Reality Composer Pro like below This get triggered by a notification posts from the code.Once this time line triggered, I want to repeat this 2 animations in the timeline unitll user takes the next action. How can I make these repeat forever?