So... I think I somehow managed to fix the tone-mapped HDR on Cyberpunk for PC. Take this with a grain of salt - I don't know shit about brightness levels and whatnot, but I know what true blacks look like.
Ironically, I'm getting true blacks and what looks to be an HDR picture with the game running in SDR mode. This was tested on my 55" LG C9 OLED. Here's what I'm doing:
- Turned on Windows HDR setting
- Went into Nvidia Control panel to force YUV422 10-bit color settings (Output Dynamic Range set to Limited)
- TV has Black Level set to Low
- TV has Dynamic Tone Mapping enabled
- In-game HDR disabled (e.g. using SDR with Gamma adjusted for my TV)
That's it. I immediately noticed the intro/trademark screens showcasing true blacks when booting. The colors also seem to pop quite a bit more, contrast is a lot more fine-grained, and the washed out look is completely gone. My TV reports that I'm displaying an HDR picture, too. I have no idea why this has the effect that it does, especially considering the game is supposedly displaying SDR. Maybe forcing the SDR in the YUV422 10-bit container results in properly tone-mapped HDR?
I'll try to upload a picture later so people can verify whether I'm crazy or not.