I can reproduce this consistently now: Save auth token to keychain... Kill app entirely & put device to sleep... Wait at least 20 minutes... Restart the app & the auth token has been wiped... I'm on an iPad (6th Gen), iPadOS 15 beta.

Perhaps the documentation should be updated. https://developer.apple.com/documentation/scenekit/scntechnique#1965885. One of the main examples given is deferred shading to achieve SSAO which is exactly what @pprovins is trying to achieve.

It does seem as though SceneKit has been abandoned @lenk - I haven’t found any mention of it this WWDC. That’s really a shame because I think SceneKit has a great place in iOS. I don’t really feel comfortable continuing to use SceneKit in my apps if Apple clearly has no intention of maintaining it. There are already some bugs I wish could be fixed, let alone this compiler issue being introduced. Can RealityKit be used for non-AR use cases? If not, what is the recommended stack for apps with 3D features that aren’t AR? Unity is great for games, but often the 3D aspect is just one feature that needs to be integrated with the rest of the user interface.