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Hello,
I’m using Displaycal with a Colormunki Display and want to refine the calibration on a Samsung SRGB-TV. Previously I’ve adjusted white balance and gamma as far as possible with HCFR. Using standard settings with single curve + matrix, Gamma 2.2, standard white balance and so on. Display got calibrated with Displaycal, very little deviation from the “pre-calibrated” state as espected.
In a second step I’ve created a 3Dlut for MadVR on MPC-HC from this profile and imported it. Also standard settings, so Rec1886, Gamma 2.4 absolute and so on.
However enabling the 3DLut in MPC-HC brightens and desaturated the image, although the display itself is calibrated to Gamma 2.2. Shouldn’t the Gamma 2.4 3DLut darken the image instead? The behaivour is the same, no matter if playing SDR or HDR sources.Are the settings correct? Is this behaivour expected or am I double calibrating in this case? Image doesn’t look that off, I am just suprised that there is such a big jump on a “pre-calibrated” display, especially in the direction of increased brightess. If you need further details I can post them. Hope you can help me with my question.
Thanks
Calibrite Display SL on Amazon
Disclosure: As an Amazon Associate I earn from qualifying purchases.Can not see your settings. The Faq says to set the nits. https://github.com/clsid2/mpc-hc/issues/2869 . Make sure your not double tone maping. Meaning tone curve is in os and in video player pipeline. The video pipeline is the 3d lut. I wish we had 3d lut desktop without a addon. There is a 3d lut for the desktop but that has to be kept up to date or keep Windows not up to date. Not sure if I explained it good. Directions are not very good for me either.
Screenshots of the Settings and the Profile attached.
Can’t upload the 3Dlut because it is bigger than max allowed file size, but you can generate it using the settings.
Here is a screenshot of MPC-HC. 3DLut enabled on the right side. Colors desaturated like I described, also brighter in the shadows (look at his black pullover).
The behaivour is the same for all monitors on my PC, every monitor has its own Profile and 3Dlut but with the same settings.
I think your double apply the VCGT. 3d lut does not need VCGT checked if its loaded already in the video card with display lut loader. Black compensation on in the profiling will lower contrast ratio but stop black crush. BT1886 lut calibration will stop black crush too for times without the 3d lut and give better contrast ratio. It is up to you how you like it to look.
You could reset lut curve to flat with display cal profile loader and then try MPC-HC. .
bt1887 will lighten up the shadows on the right side of face. His hair won’t be dark as his shirt. I can see the difference from shirt though. In real life how dark is hair? A tip is to set SDR nits to what the picture was graded at standards are 80,100,120,160. 100 is the best to me. 80 to 160 is 1stop very noticable. 120 is half so somethings to bright to my eyes on NCIS in a dark room. 100 looked best on Battlestar Galactica with it not being able to see artifacts in the dark since it is dark as supposed to be. Some parts are very bright on the radiated planet and tricked me to go to 50 nits.
I think your double apply the VCGT. 3d lut does not need VCGT checked if its loaded already in the video card with display lut loader.
Displaycal Loader says that it detected madVR and disabled calibration. Also you see a slight change on the desktop when closing madVR, as if you disable/enable the profile. So I think profile is correctly disabled and not double applied.
As you suggested I tried creating a 3DLut without VCGT, but visually it looks basically the same to me.
Concerning brightness: The problem appears no matter if watching SDR or HDR content. Display is set to 200 nits, which is also set in madVR for HDR.
So if you disable VCGT, but still have a shift in brightess and saturation, there must be some misconfiguration in the 3Dlut settings.
Looking at the 3D LUT from the attached device link profile, there is some desaturation of green & yellow.
Greyscale is slightly darker and relatively neutral.
But, comparing the grangers, I notice a lifting of the shadows that’s not visible in the neutral tones. Interesting
Can you also attach the display profile, not just the device link?
Can you also attach the display profile, not just the device link?
What do you mean? I’ve attached the profile in this post: https://hub.displaycal.net/forums/topic/madvr-3dlut-brightens-the-image/#post-145978
Concerning the difference, the selected scene is really extreme because of the darkness. If you have a average daylight movie image, there is only a bit desaturation but the difference is smaller by far.
When Displaycal loader is disabled it does not reset the VCGT to linear. It does this to HCFR also and HCFR can use the VCGT or Not with Displaycal useing its settings. There is a difference in a black compensated profile vs a non. I think the 3d lut is built from the color profile so it is black compensated. I am not useing 3d luts so do not remember or know. What is your contrast ratio ? Black compensated changes mine from 900 to the 300s. Looking at the VCGT yours might not be that bad with black compensated.
My research shows it might be a levels issue. I agree with DaniJ.
200 nits i think I would be blind. My eyes were hurting at 100 again. Everyones eyes are different. Do you see more color bar ramps? This can help set levels. https://www.avsforum.com/threads/avs-hd-709-blu-ray-mp4-calibration.948496/#replies
The Black clipping level test you should see 18 flash and barely see 17. 16 and below should not be seen.
Displaycal generates a display profile (A).
When creating a 3DLUT for madvr it also generates a device link profile (B).
You attached (B). I’m also asking for (A).
Here is the full folder under “roaming/storage/…” as a ZIP attached.
3DLut under the following link:
https://1drv.ms/u/c/a83699ec1439b04c/IQCgtlM0S_EKQafA3o1PRg9yAYgqY_dNhT5YsK-c-6SaM_Y
(can’t upload as attachment because it is too large for the file size limit)
