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Hi everyone I'm making a small private app for my one of my engineering projects, a part of this app shows a 3D model of what it looks like in real life based on a position value of a joint that needs to be updated in real time. I was able import a USDZ of the exact model of the project, and make the proper nodes that can rotate, however I run into a problem where SceneKit takes forever to update the node, I'm not sure if my code just needs optimizing or SceneKit is just not the framework to use when needing things in a 3D model to be updated in real time I've confirmed that the device receives the values in realtime, it is just SceneKit that doesn't update the model in time I'm not very good at explaining things so I put as much detail as I possibly can and hope my problem is clear, I'm also pretty new to swift and iOS development. Here is the code I'm using import SwiftUI import SceneKit struct ModelView2: UIViewRepresentable { @State private var eulerAngle: Float = 0.0 @StateObject var service = BluetoothService() let sceneView = SCNView() func makeUIView(context: Context) -> SCNView { if let scene = SCNScene(named: "V4.usdz") { sceneView.scene = scene if let meshInstanceNode = scene.rootNode.childNode(withName: "MeshInstance", recursively: true), let meshInstance1Node = scene.rootNode.childNode(withName: "MeshInstance_1", recursively: true), let meshInstance562Node = scene.rootNode.childNode(withName: "MeshInstance_562", recursively: true) { // Rotate mesh instance around its own axis /* meshInstance562Node.eulerAngles = SCNVector3(x: 0, y: -0.01745329 * service.posititonValue, z: 0) */ print(meshInstance562Node.eulerAngles) } } sceneView.allowsCameraControl = true sceneView.autoenablesDefaultLighting = true return sceneView } func updateUIView(_ uiView: SCNView, context: Context) { if let scene = SCNScene(named: "V4.usdz") { sceneView.scene = scene if let meshInstanceNode = scene.rootNode.childNode(withName: "MeshInstance", recursively: true), let meshInstance1Node = scene.rootNode.childNode(withName: "MeshInstance_1", recursively: true), let meshInstance562Node = scene.rootNode.childNode(withName: "MeshInstance_562", recursively: true) { let boundingBox = meshInstance562Node.boundingBox let pivot = SCNMatrix4MakeTranslation( boundingBox.min.x + (boundingBox.max.x - boundingBox.min.x) / 2, boundingBox.min.y + (boundingBox.max.y - boundingBox.min.y) / 2, boundingBox.min.z + (boundingBox.max.z - boundingBox.min.z) / 2 ) meshInstance562Node.pivot = pivot meshInstance562Node.addChildNode(meshInstanceNode) meshInstance562Node.addChildNode(meshInstance1Node) var original = SCNMatrix4Identity original = SCNMatrix4Translate(original, 182.85785, 123.54999, 17.857864) // Translate along the Y-axis meshInstance562Node.transform = original print(service.posititonValue) var buffer: Float = 0.0 if service.posititonValue != buffer { meshInstance562Node.eulerAngles = SCNVector3(x: 0, y: -0.01745329 * service.posititonValue, z: 0) buffer = service.posititonValue } } } } func rotateNodeInPlace(node: SCNNode, duration: TimeInterval, angle: Float) { // Create a rotation action let rotationAction = SCNAction.rotateBy(x: 0, y: CGFloat(angle), z: 0, duration: duration) // Repeat the rotation action indefinitely // let repeatAction = SCNAction.repeatForever(rotationAction) // Run the action on the node node.runAction(rotationAction) print(node.transform) } func rotate(node: SCNNode, angle: Float) { node.eulerAngles = SCNVector3(x: 0, y: -0.01745329 * angle, z: 0) } } #Preview { ModelView2() }