The following sample code shows how to implement SpriteKit within RealityKit: Implementing Special Rendering Effects with RealityKit Postprocessing RealityKit will still be running at 60 FPS, but the SpriteKit View's framerate should be adjustable.

Edit: @Eskimo Err come to think about it I should ask for one clarification regarding APs not forwarding STA-to-STA traffic before I burn myself: In your previous response you were ambiguous about the device brand, probably due to all the Peer-to-Peer Wi-Fi specifications out there. My use case is only between Apple products. Period. Does the phenomenon of some APs not forwarding STA-to-STA traffic apply to iPhone Hotspots talking with iPhones or iPads or Macs? E.g. Can an iPhone hosting a Hotspot Connection (being both AP and STA) and the iPhone being hosted (the pure STA) communicate with each other (e.g. cross streaming videos)? I did a double take and came back to ask because this is critical to me.