I think right now you've gotten your answer. but I don't think you read my post fully.Thanks but I don’t necessarily want basic-I want upscaling OFF so my tv (which is superior in upscaling -Sony Z9D) to do all the upscaling.
Isn’t there a way to let the signal from plex and the shield pass bitstream or untouched as it’s known that having a blu ray player or streaming the device alter the signal BEFORE. A tv does the same is not recommended...
I was telling you to put upscaling on, which was consistent with someone else in the forum who has your same display.
but I also gave you information on how to set Plex so that it outputs the native meaning your TV would upscale the Plex to your 4K.
The end result would have been Plex content would have been upscaled by your tv, and your streaming content would have been upscaled by The Shield.
I know what you're thinking. can you turn off upscaling completely. So your TV does it all. And of course you can. But it really is a non-solution. You would have to output everything from your Shield at 1080p. the problem with that is if you do stream you won't be able to stream 4K content because Shield is going to report to the streaming provider that you only have a 1080p display. Maybe you'll get HDR at 1080p, and maybe not. It all depends on the provider. Same with atmos. Some providers couple atmos and HDR to the 4K stream.
So you really have no choice but to let the shield upscale for streaming content. you can try basic and let your TV do the post processing (I have no idea if you're a display will do any post processing at all was it receives a 4K stream).