Hdr is on but it looks so dark n also have rainbow appear every time I switch to it can’t change brightness either any help
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Finally stumbled upon the HDR setting as well last night. I'm guessing its turned off by default because its not working right. My monitor is a SUHD 4k Samsung JS7000 with PS4 Pro and am having the same "rainbow" effect when enabled and no brightness control when the picture comes back. I was super excited that I found the tab at first but now just frustrated again... HDR works on Horizon Zero Dawn so its not a hardware/ software incompatibility.