Hi everyone, I hope this a right place to ask questions like this. I have an app which uses WEBGL scene implemented with three.js. At some point of loading, the app crashes (page reloads), which usually indicates that device ran out of memory reserved for this tab. This webgl scene however is fairly light compared to other scenes that load without any issues. How do I debug this? Is it possible to reallocate more memory before page is loaded, or is there a simple way to reduce memory consumption? I have very limited control over 3d scene, and it doesn't use heavy assets (mostly simple geometry with textures on them)

I am trying to control the orientation of a box in Scene Kit (iOS) using gestures. I am using the translation in x and y to update the x and y rotation of the SCNNode. After a long search I have realised that x and y rotation will always lead to z rotation, thanks to this excellent post: [https://gamedev.stackexchange.com/questions/136174/im-rotating-an-object-on-two-axes-so-why-does-it-keep-twisting-around-the-thir?newreg=130c66c673f848a7be2873bf675573a9) So I am trying to get the z rotation causes, and then remove this from my object by applying the inverse quaternion however when I rotate the object 90 deg around x, and then 90 deg around Y it behaves VERY weirdly. It is almost behaving as it is in gimbal lock, but I did not think that using quaternion in the way that I am would cause gimbal lock in this way. I am sure it is something I am missing, or perhaps I am not able to remove the z rotation in this way. Thanks! I have added a video of the strange behaviour here [https://github.com/marcusraty/RotationExample/blob/main/Example.MP4) And the code example is here [https://github.com/marcusraty/RotationExample)

Hi there - Where would a dev go these days to get an initial understanding of SceneKit? The WWDC videos linked in various places seem to be gone?! For example, the SceneKit page at developer.apple.com lists features a session videos link that comes up without any result, https://developer.apple.com/scenekit/ Any advice..? Cheers, Jan

We scan the room using the RoomPlan API, and after the scan, we obtain objects with a white color along with shadows and shading. However, upon updating the color of these objects, we experience a loss of shadows and shading. RoomPlan scan After Update

I want to transport my creations from UE/Unity to the APVpro environment. Is it possible right now? How can I do this? (Beg your pardon but, I have no skills in programming and I've never touched an Apple Develop kit software. I'm just a 3D artist.)

Hello, I've been tinkering with PortalComponent on visionOS a bit but noticed that the content of the WorldComponent is always clipped to the mesh geometry of whatever entities have the PortalComponent applied. Now I'm wondering if there is any way or trick to allow contents of the portal to peek out – similar to the Encounter Dinosaurs experience on Vision Pro (I assume it also uses PortalComponent?). I saw that PortalComponent has a clippingPlane property (https://developer.apple.com/documentation/realitykit/portalcomponent/clippingplane-swift.property). But so far I haven't been able to achieve a perceptible visual difference with it. If possible I would like to avoid hacky tricks using duplicate meshes or similar to achieve this. Thanks for any hints!

With the advent of the third dimension, I wanted to know wether if it's currently possible to display the flat swiftUI Views with some thickness in xrOS? While the .frame(depth: CGFloat?) does the job for Views in general, I am eager for a more granular level of control at the pixel-specific level. I was hoping that there are lower level APIs to achieve this & I've looked into the fairly new layerEffect shader API, yet it seems it's incapable of setting the depths of pixels...

Greetings, I'm a new developer and would like to understand exactly how XCode, SwiftUI, Reality Kit, ARKit, Reality Composer Pro and Unity work together to create a cosmology app in 3D? I have created a working solar system using Javascript and html and WebGL for the 3D stuff. I would now like to carry that over to the Apple Vision Pro. Can someone tell me what software frameworks, and api's in the Apple ecosystem I can use to code that? Many thanks

I have a glb model that is loading absolutely fine, repeatedly, in safari or chrome. There is only one texture that is 8192x8192 it never has a problem when loading in browser. when we embed the url into an app, the model loads the first few times (exiting the model and going back to the main menu and then reloading the model) but, after a few attempts, the texture fails to load. The model and all data is visible but the texture, itself, is black. why could this be happening? Is there something in the iOS code that is breaking it? Is the iOS code trying to automatically cache the texture and it’s running out of memory? anyone who can provide the help and support that we require will be much appreciated. thank you advance.

I am fairly new to 3D model rendering and do not know where to start. I am trying to, ideally with ARKit & RealityKit or SceneKit, do a scan of an environment. This includes: Applying realistic textures to the model. Being able to save it as a .usdz file (to be able to open it within the App itself) Once it is save do post-processing measurements within the model. I would prefer to accomplish this feature by using a mesh, instead of the pointCloud that is used in the sample project of apple. Would this be doable using Apple's APIs and on a mobile device or would it be necessary to use a third party program? I have managed to create a USDZ file using SceneKit's .scene.write(to:,delegate:) method. However the saved file is a "single object" and it is not possible to use raycasting to do post-processing measurements in the model.

Hello! I need to display a .scnz 3D model in an iOS app. I tried converting the file to a .scn file so I could use it with SCNScene but the file became corrupted. I also tried to instantiate a SCNScene with the .scnz file but that didn't work either (crash when instantiating it). After all this, what would be the best way to use this file knowing that converting it or exporting it to a .scn file with scntool hasn't worked? Thank you!