What can I do about `MTLTextureDescriptor has invalid pixelFormat (0)? - swift

Question

Upon initialization of my scene, on rare occasions the app will crash with this error
com.apple.scenekit.scnview-renderer (18): signal SIGABRT
The following is printed in the console
-[MTLTextureDescriptorInternal validateWithDevice:]:1097: failed assertion `MTLTextureDescriptor has invalid pixelFormat (0).'
Lastly, here is the function which is called before the crash
func setupRandomScene() {
self.scene.rootNode.childNodes.forEach({ (node) in
node.removeFromParentNode()
})
DispatchQueue.main.async {
if !Model.shared.hasSeenTooltips {
self.scene = SCNScene(named: "art.scnassets/levels/level\(0).scn")!
} else {
switch Model.shared.level {
case 1...10:
let randomInt = Int.random(in: 1...8)
self.scene = SCNScene(named: "art.scnassets/levels/level\(randomInt).scn")!
case 11...20:
let randomInt = Int.random(in: 1...16)
self.scene = SCNScene(named: "art.scnassets/levels/level\(randomInt).scn")!
default:
let randomInt = Int.random(in: 9...40)
self.scene = SCNScene(named: "art.scnassets/levels/level\(randomInt).scn")!
}
}
let randomColorInt = Int.random(in: 1...4)
switch randomColorInt {
case 1:
self.scene.background.contents = UIImage(named: "art.scnassets/bg/purple")
case 2:
self.scene.background.contents = UIImage(named: "art.scnassets/bg/pink")
case 3:
self.scene.background.contents = UIImage(named: "art.scnassets/bg/orange")
case 4:
self.scene.background.contents = UIImage(named: "art.scnassets/bg/teal")
case 5:
self.scene.background.contents = UIImage(named: "art.scnassets/bg/cyan")
default:
self.scene.background.contents = UIImage(named: "art.scnassets/bg/blue")
}
self.scene.rootNode.childNode(withName: "road", recursively: true)?.geometry?.materials.first?.diffuse.contents = UIColor.black
self.scene.rootNode.childNode(withName: "finishPlatform", recursively: true)?.geometry?.materials.first?.diffuse.contents = UIColor.black
self.scene.rootNode.addChildNode(self.cameraNode)
self.scene.physicsWorld.contactDelegate = self
self.scene.physicsWorld.gravity = SCNVector3(0, -9.8, 0)
self.playerNode = SCNNode()
self.setupPlayerNode()
self.setupSounds()
self.dancingAnimation = SCNAnimation(named: "art.scnassets/stickman/dance\(Int.random(in: 1...10)).scnanim")
let directionalLight = SCNNode()
directionalLight.name = "directional"
directionalLight.position = SCNVector3(-10, 50, -100)
directionalLight.light = SCNLight()
directionalLight.light?.type = .directional
directionalLight.light?.castsShadow = true
directionalLight.light?.shadowRadius = 2 // 1000
directionalLight.light?.shadowSampleCount = 20 // 20
directionalLight.light?.shadowMapSize = CGSize(width: 2000, height: 2000)
directionalLight.light?.intensity = 2000
directionalLight.eulerAngles = SCNVector3(0, -toRadians(angle: 150), -toRadians(angle: 60))
self.scene.rootNode.addChildNode(directionalLight)
let ambientLight = SCNNode()
ambientLight.name = "ambient"
ambientLight.light = SCNLight()
ambientLight.light?.castsShadow = false
ambientLight.light?.type = .ambient
ambientLight.light?.color = UIColor.darkGray
ambientLight.light?.intensity = 5000
self.scene.rootNode.addChildNode(ambientLight)
self.cameraNode.position = SCNVector3(self.playerNode.position.x, self.playerNode.position.y + 5, self.playerNode.position.z - 9)
self.cameraNode.eulerAngles = SCNVector3(-toRadians(angle: 5), -toRadians(angle: 180), 0)
self.cameraNode.camera = SCNCamera()
self.gameState = .menu
self.scnView = nil
self.scnView = self.view as? SCNView
if let _ = self.scnView {
self.scnView!.delegate = self
self.overlayScene = OverlayScene(with: self.overlaySceneSize, isLive: self.broadcastController.isBroadcasting)
self.scnView!.overlaySKScene = self.overlayScene
self.scnView!.present(self.scene, with: .fade(with: .white, duration: 1), incomingPointOfView: nil, completionHandler: nil)
}
if !Model.shared.soundIsMuted {
self.playerNode.runAction(self.playWooshSound)
}
self.positiveHaptic.prepare()
}
}