Given my limited knowledge of physics, I would appreciate it if individuals with a solid understanding of the subject could provide insights into this matter. I have added a physical component to a entity in Reality Composer Pro, but I am seeking guidance on how to achieve the following: Make an object float in the air (with a slight downward motion reminiscent of the moon’s surface) Enable the object to move at a slow pace Implement a strong rebound force I would be grateful if you could provide appropriate values for these parameters. Thank you for your assistance.

Hello, I am getting following error on console and my app crashes. It goes to dark and then Apple logo appears and app crashes apply fence tx failed (client=0x61dbbfd7) [0xfffffecc (ipc/mig) server died] [C:3] Error received: Connection interrupted. Failed to commit transaction (client=0x94097449) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xe9684b50) [0x10000003 (ipc/send) invalid destination port] [C:3-1] Error received: Connection interrupted. Failed to commit transaction (client=0xbcac17e9) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0x52392119) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xff841d17) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xdef5c915) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xefdc8bf3) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xd50c1eff) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0x15690a46) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xf296f56b) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0x61dbbfd7) [0x10000003 (ipc/send) invalid destination port] apply fence tx failed (client=0x61dbbfd7) [0x10000003 (ipc/send) invalid destination port] nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_protocol_socket_reset_linger [C1:2] setsockopt SO_LINGER failed [22: Invalid argument] apply fence tx failed (client=0x61dbbfd7) [0x10000003 (ipc/send) invalid destination port] Failed to set override status for bind point component member. Failed to set override status for bind point component member. Failed to set override status for bind point component member. Message from debugger: Terminated due to signal 9 Could you please tell me what's the reason and how can I resolve this. When I loads 2,3 times then app works fine from that point onwards. But this happens time to time when debug.

Hello! I am working on some cool project reconstructions for a client. They design lobby sized installations with LED walls. I am being tasked with converting these over to AR at scale. I've got my first test in headset and it looks great! However, the desire to just walk around more than the 10' x 10' safe area zone totally takes one out of the immersive VR experience - which is pretty counter intuitive. Is there any way for us developers to by pass this hard limit, so that clients who are requesting more room-scale options can actually enjoy this in VR? Alternatively, is there a way to hook up a PS5 controller to a "player start" so I can navigate inside the VR volume? I'm really trying to embrace Reality Composer Pro, but it seems extremely limiting as I wait for Unreal Engine to get its act together. sigh. Thanks for any help or suggestions.

In RealityKit, I know that an HDR image is pre-calculated, and through the settings of the ImageBasedLight Component, a specified specular object can reflect the content of the HDR image. If a mirror object is originally very large, such as a large-area continuous glass door, after specifying an IBL image for these glass doors, the image reflected by the mirror will be obviously deformed when it moves in space. Because IBL is a picture of the surrounding environment at a point, while the glass door is a surface. Is there a truly real-time specular reflection calculation setup in RealityKit that can reflect the model on the opposite side of the glass door?

I have no clue at all. Any suggestions are welcome. Thank you.

How to create fire effect in Reality Composer Pro? Should I use particle emitter?

Behavior: Orbit animation doesn't show up. Both for OnTap trigger and OnAddedToScene trigger. It is not an issue with my code because I tested with an emphasize float animation and it works perfectly. Environment: ARKit + RealityKit, iOS18 My animation timeline settings: A simple Orbit animation block with a target, a pivot entity. 1s duration, orbit direction clockwise, axis(0,1,0), 1 revolution, and blend layer 300. My Behavior setting: OnTap -> play the animation

TLDR: Timeline does not play animation when Repeat Forever is checked. Hi! I have created a timeline for my model that does a built-in emphasize animation. Then I added a behavior to my model and has set OnAddedToScene with action to run that timeline. It works perfect well on my device. But I want the timeline to be looped. I realized that there's no loop option in the timeline, but I noticed that I can loop it if I insert it into another timeline(The loop checkbox shows up). So I did that and had my model's behavior to run that timeline. But then the model doesn't play the animation as intended. Note: I am not making a VisionPro app, but an iOS app leveraging ARKit and RealityKit Environment: iPhone 13 Pro Max with iOS18.0 Code: struct ARViewContainer: UIViewRepresentable { func makeUIView(context: Context) -> ARView { let arView = ARView(frame: .zero) arView.session.run() Task { do { let anchor = AnchorEntity(plane: .horizontal) let emojiScene = try await Entity(named: "SunglassesScene", in: bubbleAR anchor.addChild(emojiScene) arView.scene.addAnchor(anchor) } catch { print("Failed to load models: \(error)") } } return arView } } Thank you!

The 3D furniture model I built uses some smooth specular reflection materials. I hope to only reflect the HDR image of the ImageBasedLight component I set myself, without reflecting the light source of the AR real environment. How to achieve this in the following scenario? How to avoid being affected by the light source of the AR real environment when using PBR materials When using Shader Graph, how can EnvironmentRadiance not be affected by the light source of the AR real environment?

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

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

Is there a good way to have an app open scenes from Reality Composer Pro, without that scene being part of the app? Kind of like you would browse any other file. I have a business where I provide walk throughs in building plans. I do this by building an app containing a Reality Composer Pro scene containing the customers building. For each customer I will duplicate the app and change the Scene content. (One app per customer) In order to scale my business I would love to be able to distribute the scenes to the customers so they could just open them in the app, but I don't see how to to that. If you have any idea as to how this can be done it would be great! I have very little experience in coding, so please assume I don't know what you are talking about when explaining

I am trying to use onNofitication in BehaviorComponent to fire up my composed timeline actions. Which is formed up by one TransformTo action, one Hide action and followed by a Notification action indicating the other two actions are finished. With this post, I successfully send a notification to RCP to fire up my timeline with identification: NotificationCenter.default.post( name: NSNotification.Name("RealityKit.NotificationTrigger"), object: nil, userInfo: [ "RealityKit.NotificationTrigger.Scene": scene, "RealityKit.NotificationTrigger.Identifier": "onSomethingStart" ] ) On the other hand, to subscribe that Notification Action, I append a onReceive function below my RealityView, and succesfully received my notification private let notificationTrigger = NotificationCenter.default.publisher( for: Notification.Name("RealityKit.NotificationTrigger")) guard let entity = out.userInfo?["RealityKit.NotificationTrigger.SourceEntity"] as? Entity, let notificationName = out.userInfo?["RealityKit.NotificationTrigger.Identifier"] as? String else { return } debugPrint("Received notification: \(notificationName), entity name: \(entity.name)") Which means that my Timeline is fired up because I can received my notification in my Timeline. But the rest two actions just don't appear to be working. I played the timeline in RCP it works fine. Anything I missed to make it tick? XCode beta 16.1 VisionOS beta 9

I want to use SIMD values with a design time component. public struct SomeComponent: Component, Codable { public var Magnitude: SIMD3 = .zero } Is extra work required? I had understood that serialization of simple values including SIMD would be handled by Reality Composer Pro. At run time I get the error: decodeComponent: Unexpected error: keyNotFound(CodingKeys(stringValue: "Magnitude", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: "Magnitude", intValue: nil) ("Magnitude").", underlyingError: nil)) Asset deserialization failed. Asset type "SceneAsset". Details: Failed to deserialize "/container/@shared/17/object". Reason: Failed to deserialize Swift Codable component of type RealityKitContent.SomeComponent.

VisionOS integrates SwiftUI interface in Unity, but the system drag bar at the bottom of the interface is too far away from the interface. How to solve this problem?

My visionOS app has over 150 3D models that work flawlessly via firebase URL. I also have some RealityKitContent scenes (stored locally) that are getting pretty large so I'm looking to move those into firebase as well and call on them as needed. I can't find any documentation that has worked for this and can't find anyone that's talked about it. Does anyone know if this possible? I tried exporting the Reality Composer Pro scenes as USDZ's and then importing them in but kept getting material errors. Maybe there's a way to call on each 3D model separately and have RealityKit build them into the scene? I'm not really sure. Any help would be much appreciated !

RealityContentKit bundle resource issue Recently I always encounter weird loading bugs from RealityKitContent bundle. When I was trying to load audio resource as AudioFileResource or AudioFileGroupResource by loading from *.usda from RealityKitContent bundle, with this method. My code is nothing complicated but simple as below: let primPath: String = "/SampleAudios/SE_bounce_audio" guard let resource = try? AudioFileGroupResource.load(named: primPath, from: "MyScene.usda", in: realityKitContentBundle) else { return } And the runtime program "sometimes"(whenever I change something RCP it somethings work again but the behavior is unpredictable) reports that it "Cannot find MyScene.usda:/SampleAudios/SE_bounce_audio in RealityKitContent.bundle". I put MyScene.usda under the root folder of RealityKitContent package because I found that RealityKit just cannot find any *.usda scene if you didn't put that on the root level (could be a bug because of the way it indexes its files). I even double checked my .usda file with usdview, the primPath is absolutely correct. I think there are some unknown issues when RealityKitContent copy resources and build the package. I tried to play with the package Package.swift file a bit to see if I could manually copy my resources (everything) and let the package carry my resources but it just didn't work. So right now I just keep this file untouched below (just upgrade the swift-tools-version to 6.0 as only that can supports .visionOS(.v2)): // swift-tools-version:6.0 // The swift-tools-version declares the minimum version of Swift required to build this package. import PackageDescription let package = Package( name: "RealityKitContent", platforms: [ .visionOS(.v2) ], products: [ // Products define the executables and libraries a package produces, and make them visible to other packages. .library( name: "RealityKitContent", targets: ["RealityKitContent"]), ], dependencies: [ // Dependencies declare other packages that this package depends on. // .package(url: /* package url */, from: "1.0.0"), ], targets: [ // Targets are the basic building blocks of a package. A target can define a module or a test suite. // Targets can depend on other targets in this package, and on products in packages this package depends on. .target( name: "RealityKitContent" ), ] ) That is just issue one, RealityKitContent package build issue. Audio file format issue Another is about Audio File Format RCP supports. I remember is a place (WWDC?) saying .wav and .mp4 are supported to be used as audio source. But when I try to set up Spatial Audio, I find sometimes *.wav or *.mp3 can also be imported as AudioSourceFile. But the behavior is unpredictable. With two *.wav files SE_ball_hit_01.wav and SE_ball_hit_02.wav, only SE_ball_hit_01.wav is supported, 02 is reported as the format is not supported/ Check out my screenshots to see the details of two files. Two files have almost the same format (same sample rate or channel). I understand there might be different requirements for a source file to be used as Spatial or Ambient audio. But I haven't figured that out or there is nothing I can find helpful on Apple Documentation. So what is the rules? Thanks for reading and any thought is welcomed.

Hello! I have the great fortune to be working on a joint Apple/(unnamed brand) app. I am teamed up with a photogrammetry vendor, and will be assembling a scene in Maya, using a UDIM workflow from retouched assets in Substance Painter. This will be for an immersive environment, similar to Joshua Tree and the Hawaiian environments on AVP, which are great. We did a first pass, bringing USDZ files into Reality Composer Pro and sending to headset - very cool. However the models have a specular component that is washing everything out. After further researching, I learned that I need to not be using a Physically based shader, but instead, an Unlit shader. I had to manually create this in RCP, then it viewed properly. The issue is, every time I need to add a new asset, will I now have to manually create numerous custom shaders? Ideally, I am wanting to either figure out how to get an Unlit shader specified in Substance Painter that will get exported out properly, in addition to getting it to export from Maya. I tried using a Maya SurfaceShader - which is essentially unlit - but that does not export properly. I found that a Maya StandardSurface will export properly, however, it still imports as Physically Based shader. The conundrum is, I'll be working with a UDIM workflow, and would like to avoid having to manually create and hookup what could be between 10-40 textures per USDZ file. I guess what I'm trying to ask is - what is the preferred shader to use in Maya when exporting to USDZ that will import as Unlit? Or, is there a way to easily switch from Physically Based to Unlit inside RCP? And NOT doing it in Xcode/Swift, because the files I need to deliver need to be USDZ, the the developer will be assembling themselves. I'm using Maya because I need to work on my PC for the heavy GPU lifting, and also, it's just easier to assemble everything there VS Reality Composer Pro, which is like the iMovie of game engines. ;) (please take that constructively, it really needs to be more industry standard). I just need to make sure I can use Maya with the proper shaders to export my pieces, quickly send to RCP (with proper Unlit specification) then over to headset so I can check stuff in realtime with my photogrammetry vendor. Any help or advice is greatly appreciated! I'm really excited to be working on my first Vision Pro app. Thx!

From my early testing it seems like the object tracking works best for static objects. For example, if I am holding something in my hand the object tracker is slow to update. Is there anything that can be modified to decrease the tracking latency? I noticed that the Enterprise API has some override features is this something that can only be done using Enterprise?

My goal is to pin an attachment view precisely at the point where I tap on an entity using SpatialTapGesture. However, the current code doesn't pin the attachment view accurately to the tapped point. Instead, it often appears in space rather than on the entity itself. The issue might be due to an incorrect conversion of coordinates or values. My code: struct ImmersiveView: View { @State private var location: GlobeLocation? var body: some View { RealityView { content, attachments in guard let rootEnity = try? await Entity(named: "Scene", in: realityKitContentBundle) else { return } content.add(rootEnity) }update: { content, attachments in if let earth = content.entities.first?.findEntity(named: "Earth"),let desView = attachments.entity(for: "1") { let pinTransform = computeTransform(for: location ?? GlobeLocation(latitude: 0, longitude: 0)) earth.addChild(desView) // desView.transform = desView.setPosition(pinTransform, relativeTo: earth) } } attachments: { Attachment(id: "1") { DescriptionView(location: location) } } .gesture(DragGesture().targetedToAnyEntity().onChanged({ value in value.entity.position = value.convert(value.location3D, from: .local, to: .scene) })) .gesture(SpatialTapGesture().targetedToAnyEntity().onEnded({ value in })) } func lookUpLocation(at value: CGPoint) -> GlobeLocation? { return GlobeLocation(latitude: value.x, longitude: value.y) } func computeTransform(for location: GlobeLocation) -> SIMD3<Float> { // Constants for Earth's radius. Adjust this to match the scale of your 3D model. let earthRadius: Float = 1.0 // Convert latitude and longitude from degrees to radians let latitude = Float(location.latitude) * .pi / 180 let longitude = Float(location.longitude) * .pi / 180 // Calculate the position in Cartesian coordinates let x = earthRadius * cos(latitude) * cos(longitude) let y = earthRadius * sin(latitude) let z = earthRadius * cos(latitude) * sin(longitude) return position } } struct GlobeLocation { var latitude: Double var longitude: Double }