HDR Problem

Hello.

I've noticed HDR problem - hdr content is not fully bright BUT it becomes fully bright when I move mouse to the bottom so control bar show up. I'd like my movies to be fully bright without control bar The are also fully bright when in windowed mode.

I thought it was ABL OLED problem, but in fully black scenes at the bottom, it also appeared.

I also think that full bright "mode" gets also white clipping?

Movie checked 1: Kung Fu Games (2024), 2160p HDR Web, MKV, 1000 nits
Movie checked 2: Baghead (2023), 2160p HDR Web, MKV, 1000 nits
Monitor: LG UltraGear 45GR95QE OLED (3440x1440, 10-bit, mode Gamer 1 = 600nits max)
GPU: RTX 3090, HDMI 2.0
OS: Windows 11 64-bit
Color mode: 10-bit (Monitor true 10-bit, OS/Nvidia 10-bit)
HDR Mode: OS HDR On
Exclusive full screen: No
Player: MPC-HC
Codecs?: LAV Video, LAV Audio, LAV Splitter
HDR codec?: Not MadVR, I switched to MPC VideoRenderer RTX SuperRes 1.1 (https://github.com/emoose/VideoRenderer/releases) and I have OS Auto HDR On, Nvidia adding HDR to SDR On, Nvidia Upscaling On with mode 4 (best). Movie is not auto hdred (since it's hdr already) and not upscaled (since it has higher resolution than the monitor). To with with RTX, Video DirectShow is set to MPC Video Renderer.
Codecs version - from maximum 3 months ago
Other info: I use Philips Hue (Ambilight)

Photos taken with phone in pro mode so all the setting are the same (no auto white balance etc.):






Rest of photos:
https://ibb.co/p2GW7wH
https://ibb.co/YNVyQrJ
https://ibb.co/3TXT6s6
https://ibb.co/bNtdQY2
https://ibb.co/CnDDq6g
https://ibb.co/mvBbLH4

Use the MPC Video Renderer version that is included with the codec pack. The one you use is old and buggy.

And SuperRes is not used in this situation. Not only because it only works with 1080p and below. But you also aren't upscaling.

Also, the brighter picture is actually wrong. In that case it uses the Windows desktop HDR metadata instead of the video metadata.