PG32UCDM Console Mode HDR issue

[FallenDeity]

My and other's PG32UCDM monitors have a clipping issue on PC when using the console HDR mode in Windows 11. Currently, the monitor clips at 450 nits in the Maximum Luminance window but it clips correctly in the Max Full Frame Luminance window. Is there a firmware update in the works for this or is this an RMA issue?

[silverbolt81]

This is exactly what i am seeing on my monitor with the 103 firmware under Gaming Hdr..

Anything above 450 nits peak brightness over blows the specular highlights..

[Kundica]

The reason you're not getting clipping on ConsoleHDR mode in CP2077 is because you're adjusting the HDR10 PQ Saturation setting which lowers peak brightness the higher you move it up. It's effectively making your 1000nit peak brightness setting 500nits at .5 and so on. 

For others, I roughly explained in an earlier post how I believe ConsoleHDR mode is functioning and why it's clipping in certain situations. I've taken some measurements and will try to detail that later today.

[silverbolt81]

@Rogex47 

O.k so here i took two screenshots with Gaming Hdr and Console Hdr with the current firmware 103.

https://file.io/EjDURHqDH21t

You need to download HDR image viewer in order to see the difference properly

https://www.microsoft.com/store/productId/9PGN3NWPBWL9?ocid=pdpshare

[Rogex47]

Ok...
This is definitely not what it looks like for me and what I also dont understand is that in your screenshots under "Image Information" it says "Estimated MaxCLL: 1312 nits". Since the monitor is only capable of 1000nits at 2% it is no wonder the neon sign is not readable due to clipping. 
I took 2 screenshots in Console HDR mode, one with Peak Brightness set to 1000 and White set to 250 and a second screenshot with Peak set to 1000 and White set to 400. In both cases I am not even close to your MaxCLL.

What are you other HDR ingame setting beside preak brightness?

Edit Link: https://file.io/qYQ3XBc34noc

Edit2: As @Kundica has explained I am using HDR10 PQ Saturation of 0.7 which explains why our MaxCLL values are so different.

[DonDOOM]

I'm thinking it depends on the game. The windows HDR cal app clips at 450 like everyone else is stating.

But the games I've tested - Dead Space Remake, Helldivers 2 and The Witcher 3 it's working properly as far as I can tell. Med - high APL scenes look almost as bright as they would on SDR, not quite there, but acceptable. And, in the Deadspace Remake as it's a dark game - easy to test for brightness peaks, I can say the highlights seem to go up to 1000 nits properly.

Edit:

Just tested out a game using RTX HDR and it is definitely clipping, losing all detail in those small highlights.

[Arhat1984]

Do you use instruments that measure light levels? Anecdotally it looks like it's working but without measurement, one cannot be 100% sure.

[DonDOOM]

No, as I said - as far as I can tell - those games I listed look like they're functioning properly. I don't have access to a colorimeter or a lux meter.

I have found there is significant clipping on  some older titles using RTX HDR, and apparently on other games like CP2077 and Horizon ZD / Forbidden West as others have noted.

This beta firmware seems to have some issues with different games depending on their HDR implementation.

[skyhopper01]

While it is good to see these issues being addresses. I am personally going to wait for an official release of 104.  103 is working well enough for me.  Sure it could be better, but I have been using Gaming Mode HDR and it really looks great, especially in Horizon Forbidden West. 

[InvictuSZN]

Honestly I myself don't use native HDR in games to test this as every game behaves different and I cant know what nits something actually is...

I personally just use Reshade with full addon support with Liliums Inverse Tonemapping (which is something like RTX HDR / AutoHDR) instead of native HDR and pair that with Liliums HDR analyzer that way I can 100% tell what nits an object is supposed to be and dynamically adjust from 400 nits to 1000 nits live in-game. That way you can instantly see the clipping happen in real time and at what nits.

https://github.com/EndlesslyFlowering/ReShade_HDR_shaders

You can look up on Youtube how you use/install it.

Saying that 104 looks good or fine is either blind or coping or doesn't know what clipping looks like, ngl.

[DonDOOM]

I have found clipping in Dead Space Remake as well.