We are trying to save usdz file in file manager some time its saved but some time we are getting the error. Like: path.absoluteURL file:///var/mobile/Containers/Data/Application/6D14A430-47B4-45F2-9D0D-6C31588A6A03/Documents/2896837C-C7E0-4FA8-BFE2-21A59B26D801.usdz Warning: in SdfPath at line 151 of sdf/path.cpp -- Ill-formed SdfPath </2896837CC7E04FA8BFE221A59B26D801>: syntax error Coding Error: in _IsValidPathForCreatingPrim at line 3338 of usd/stage.cpp -- Path must be an absolute path: <> cannotCreateNode(path: "/2896837CC7E04FA8BFE221A59B26D801") func saveFileLocal() { if let finalResult { let fm = FileManager.default var path = fm.urls(for: .documentDirectory, in: .userDomainMask).first! let fileName = "(UUID().uuidString).usdz" path.appendPathComponent(fileName) do { try finalResult.export(to: path.absoluteURL) } catch{ print(error) } } } func removeFiles() { var filePath = "" let fm = FileManager.default let path = fm.urls(for: .documentDirectory, in: .userDomainMask).first! do{ let content = try fm.contentsOfDirectory(atPath: path.path) for c in content{ filePath = path.appendingPathComponent(c).absoluteString if let url = URL(string: filePath){ try fm.removeItem(at: url) } } } catch{ print(error) } }

With the latest software upgrades such Sonoma 14.0, Xcode 15.0 Beta 8 and Reality Composer Pro, what is the alternative to behaviours for a web based AR app for iOS 17? Any example, documentation or tutorial about how to use custom components to provide user interactivity such click events and be able to export the scene as USDZ?

I am using the RoomPlanExampleApp to export a USDZ. When I open the USDZ on Reality Converter, I get this error Invalid Structure in USDZ file The root layer of the package must be a usdc file and must not include any external dependencies that participate in stage composition.

I'm trying to convert GLB file to USDZ using Reality Converter. According to Khronos gltf validator, it is valid without warnings. The file contains single animation. It is possible to get any more information about error that happened than this? The file I'm trying to convert is https://www.dropbox.com/scl/fi/ng38kle0drr4srypw5ntz/Project-Name-copy-1-1.glb?rlkey=ay4d1q3n1ykyixe3krlvnfeyb&dl=1 (I cannot attach it here because limit is 244.140625Kb...) The workaround to get this conversion working is to remove the animation, or change order or objects. Removing animation is not an option, and changing order of objects is bit of a magic solution that cannot really be automated without understanding what is happening I've downloaded Reality Converter from here https://developer.apple.com/augmented-reality/tools/ today, so I assume that is latest version

Anybody has noticed pivot issue in constructed model through object capture. Ideally pivot of object should be centre of bounding box but with new macOS changes now pivot is at 0,0,0 (below the bounding box) Here is a quick comparison Old v/s new

Does anyone know where I can find quality assets in USDZ format? For Unity and Unreal Engine, I just use the built-in asset stores. There seem to be a number of third-party 3D model stores like Laughing Squid, but they tend not to have models in USD format. In particular, I'm looking for some nice-looking explosions for a RealityKit-based visionOS game I'm writing. Some nice boulders would also be useful. Thanks in advance!

Hi, I've been exploring a project with visionOS, and have been quite confused on capabilities and workflows for using custom materials in RealityKit & RealityComposerPro for visionOS. Ideally I would be able to create / load / modify a model and its materials in Blender, export to openUSD and have it load in fully in RCP, but this hasn't been the case. Instead different aspects of the material don't seem to be exported correctly and that has lead me to investigate more into understanding MaterialX, openUSD and Metal, and how they work in visionOS, RealityKit and RealityComposer. MaterialX was announced as a primary format for working with 3D materials, but the .mtlx file format doesn't appear to be compatible in RCP directly - specifically trying materials provided in the AMD OpenGPU MaterialX Library. (note: AFAIK, Blender does not currently support MaterialX) When downloading a material, this provides a folder with the textures and corresponding .mtlx, but currently in RCP (Xcode 15.6 beta) this file is ignored. Similarly, trying to load it using ShaderGraphMaterial fails with 'Error in prim' and no other details that I can see. It also appears that there is a way of bundling MaterialX files within an openUSD file (especially implied by the error about Prims), but I haven't been able to understand how this can be done, or if this is the correct approach. Unpacking the Apple-provided materials in RCP from usdz to usda, these appear to define the shaders in openUSD and reference the RCP MaterialX Preview Shader (presumably created using the Shader Graph). There is also reference however from the official MaterialX.org and OpenUSD around using a USD / MaterialX Plugin to enable compatibility. I've also tried, and followed along with the introductory tutorial on the in-built ShaderGraph, and find it difficult to understand and quite different from Blender's Shader Nodes, but it currently appears that this is the primary way promoted to create and work with materials. Finally, I had expected that CustomMaterials using Metal Shaders would be available, as Metal was mentioned for Fully Immersive Spaces, and 'Explore Advanced Rendering with RealityKit 2' from WWDC21 covers using custom shaders, but this is not listed as included in visionOS and according to an answer here, it's not currently planned. (although the documentation here still mentions Metal briefly) Overall, what are the suggestions for workflows with materials for RealityKit on visionOS? Is there a fully compatible path from Blender -> openUSD -> RealtyComposerPro? Do I need to export materials and models from Blender individually and rebuild them in RCP using the ShaderGraph? Can I utilise existing MaterialX materials in RealityComposerPro, and if so, how? Are there any other good resources for getting comfortable and understanding the nodes within the ShaderGraph? what WWDC talks would be good to revise on this? Really appreciate any guidance!

Is there support for using multiple UV channels in AR QuickLook in iOS17? One important use case would be to put a tiling texture in an overlapping tiling UV set while mapping Ambient Occlusion to a separate unwrapped non-overlapping UV set. This is very important to author 3D content combining high-resolution surface detail and high-quality Ambient Occlusion data while keeping file size to a minimum.

I have a USDZ file with a 3d object that is animated. Loading the 3d object into an ARView on iPad the animation shows and plays as intended. Loading, the same 3d object in a RealityView in VisionOS, results in only part of the animation playing. The part of the animation that doesn't play is a mesh animation. This animation doesn't play correctly when viewing in Reality Composer Pro either. Is this a limitation of the beta software? Will mesh animations be supported on VisionOS and in RealityViews? ARView is unavailable on VisionOS. What other options do I have to support the existing animation?

When I create an USDZ file from the original Reality Composer (non pro) and view it in the Vision OS simulator, the transforms and rotations don't look similar. For example a simple Tap and Flip behaviour does not rotate similar in Vision OS. Should we regard RC as discontinued sw and only work with RC-pro? Hopefully Apple will combine the features from the original RC into the new RC pro !

If you have a scene with a simple custom .usda material applied to a primitive like a cube, the exported (.usdz) material definition is unknown for tools like Reality Converter Version 1.0 (53) or Blender Version 3.6.1. Reality Converter shows up some warnings "Missing references in USD file", "Invalid USD shader node in USD file". Even Reality Composer Pro is unable to recreate the material correct with it's own exported .usdz files. Feedback: FB12699421

Hello, I have created a material in RCP and applied it via "Material Binding" to 3D geometry within my scene... however, when I export it out as a USDz file and open in Xcode... the material changes have not persisted. Any suggestions on why this is so?

Hi! I created manually USDZ with one cube to anchoring on wall (vertical plane) #usda 1.0 ( defaultPrim = "Root" metersPerUnit = 1 upAxis = "Y" ) def Xform "Root" ( assetInfo = { string name = "Root" } kind = "component" ) { def Xform "Geom" ( prepend apiSchemas = [ "Preliminary_AnchoringAPI" ] ) { # token preliminary:anchoring:type = "plane" # token preliminary:planeAnchoring:alignment = "vertical" matrix4d xformOp:transform = ( (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0.2, 1) ) def Xform "Group" { def Cube "cube_0" { float3[] extent = [(-1, -1, -1), (1, 1, 1)] uniform bool doubleSided = 1 rel material:binding = </Root/Materials/material_0> matrix4d xformOp:transform = ( (0.1, 0, 0, 0), (0, 0.1, 0, 0), (0, 0, 0.01, 0), (0, 0, 0, 1) ) uniform token[] xformOpOrder = ["xformOp:transform"] } } } } It's displayed correct in ARQuickLook When I add second cube to USD(z) #usda 1.0 ( defaultPrim = "Root" metersPerUnit = 1 upAxis = "Y" ) def Xform "Root" ( assetInfo = { string name = "Root" } kind = "component" ) { def Xform "Geom" ( prepend apiSchemas = [ "Preliminary_AnchoringAPI" ] ) { # token preliminary:anchoring:type = "plane" # token preliminary:planeAnchoring:alignment = "vertical" matrix4d xformOp:transform = ( (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0, 0), (0, 0, 0.2, 1) ) def Xform "Group" { def Cube "cube_0" { float3[] extent = [(-1, -1, -1), (1, 1, 1)] uniform bool doubleSided = 1 rel material:binding = </Root/Materials/material_0> matrix4d xformOp:transform = ( (0.1, 0, 0, 0), (0, 0.1, 0, 0), (0, 0, 0.01, 0), (0, 0, 0, 1) ) uniform token[] xformOpOrder = ["xformOp:transform"] } def Cube "cube_1" { float3[] extent = [(-1, -1, -1), (1, 1, 1)] uniform bool doubleSided = 1 rel material:binding = </Root/Materials/material_0> matrix4d xformOp:transform = ( (0.1, 0, 0, 0), (0, 0.1, 0, 0), (0, 0, 0.01, 0), (0.3, 0, 0, 1) ) uniform token[] xformOpOrder = ["xformOp:transform"] } } } } ARQuickLook display scene ~ 10 cm from wall, and then scene have more cubes we see increased distance from wall. Here for two cubes I also tryed recreate scene in Reality Composer on iPhone. Everything ok for one cube, and ok when preview in App(ARKit?) for two cubes, but when export scene in RealityComposer macOS to USDZ we again see wrong distance for two cubes and more. For tests I use iPhone 13 Pro Max with iOS 16.3.1

I am trying to follow the WWDC 2022 video Explore USD tools and rendering: https://developer.apple.com/videos/play/wwdc2022/10141/ I followed the steps here to create an Xcode project that uses OpenUSD to load scenes. https://developer.apple.com/documentation/metal/metal_sample_code_library/creating_a_3d_application_with_hydra_rendering?language=objc After installing OpenUSD and generating an Xcode project, I opened Xcode, set the scheme to hydraplayer and clicked the build button. The code compiles but fails to link with a bunch of undefined symbols errors like this one: Undefined symbol: pxrInternal_v0_23__pxrReserved__::GfMatrix4d::SetDiagonal(double) I tried to tag this post wwdc2022-10141, but the tag was not found so I tagged a related session.

Hi, I have this pesky issue where whenever I open an fbx or usdc file in Reality Converter it fails to load the image texture due to lack of permissions. I then have to click on each individual one to open a file dialog and manually open it. This gets boring very quickly. I have granted full disk access to Reality Converter in my Privacy & Security Preferences but this made no difference. Does anyone know how to get around this issue?

Hi all. I am new to swift and AR. I'm trying a project on AR and ran into a problem that I can't change the material on the models. With geometry such as a sphere or a cube, everything is simple. Tell me what am I doing wrong? My simple code: @IBOutlet var sceneView: ARSCNView! var modelNode: SCNNode! override func viewDidLoad() { super.viewDidLoad() sceneView.delegate = self sceneView.showsStatistics = true let scene = SCNScene(named: "art.scnassets/jacket.usdz")! modelNode = scene.rootNode.childNode(withName: "jacket", recursively: true) let material = SCNMaterial() material.diffuse.contents = UIImage(named: "art.scnassets/58.png") modelNode.childNodes[0].geometry?.materials = [material] sceneView.scene = scene

Hello Dev Community, I've been thinking over Apple's preference for USDZ for AR and 3D content, especially when there's the widely used GLTF. I'm keen to discuss and hear your insights on this choice. USDZ, backed by Apple, has seen a surge in the AR community. It boasts advantages like compactness, animation support, and ARKit compatibility. In contrast, GLTF too is a popular format with its own merits, like being an open standard and offering flexibility. Here are some of my questions toward the use of USDZ: Why did Apple choose USDZ over other 3D file formats like GLTF? What benefits does USDZ bring to Apple's AR and 3D content ecosystem? Are there any limitations of USDZ compared to other file formats? Could factors like compatibility, security, or integration ease have influenced Apple's decision? I would love to hear your thoughts on this. Feel free to share any experiences with USDZ or other 3D file formats within Apple's ecosystem!

USD added draco compression support in 19.11. is this something that apple is also considering to adopt?

Hello! I've got a website that dynamically generates a USDZ file and adds that to the webpage as described in the Apple docs here. This works as expected on iOS and iPadOS, but silently fails to load in the visionOS simulator in Xcode 15 beta 2. Example Site: https://threejs.org/examples/misc_exporter_usdz.html Repro Steps: Open the above example page in iOS and click the QuickLook icon. The model loads into QuickLook as expected. Open the visionOS simulator, and load the same site in Safari. Click the QuickLook icon. Nothing happens. I'm trying to figure out if this is a visionOS safari bug or a limitation of the OS itself, and was wondering if anybody else has hit the same problem/heard anything about Safari Quicklook params changing on visionOS. The difference between Apple's working QuickLook examples and the above site, is that whilst the official static model examples all point to a pre-generated USDZ file, the ThreeJS example generates the USDZ on the fly in Javascript code, and populates the link with a Javascript Blob object. I wonder if this more insecure format is perhaps now specifically disallowed. Thanks! Matt