We're currently using the Render Streaming package in a prototype AR application, but have resorted to chroma-key to handle the transparency (so the user can see the camera feed behind the streamed render). I am looking at solutions to allow for the alpha channel of the frame buffer to be transmitted, from a windows machine (with an NVIDIA card) to the client iPhone. I can see that the WebRTC package currently uses the NVIDIA Codec v.9.1 which I don't think supports alpha encoding (whereas 11.1 does, it seems, via HVEC). I suspect this may be a blocker to using the hardware encoding of the NVIDIA card to encode translucent pixels. Is there a solution that I'm missing? Thanks.