Originally Posted by Dave Vaughn
I've noticed a few things today in testing. First, I've tested all three of Manni's uploaded profiles, and frankly, any one of the three works great. The differences in the highlights are minimal, at best. As for shadow detail, they all beat the Gamma D. Even my wife noticed. I took a bunch of pictures, but will have to downrez them to get them to upload. Like Arnold, I'll be back.
Great to hear
Originally Posted by Dave Vaughn
OK...while the Gamma is improved, there is an issue with color saturation for some reason. The only change I made was from Gamma D to Custom 1, which is Manni's 4000 Nit profile. Check out the picture from Deadpool and how the blue is gone from the sky. Not sure what the heck is going on though. Curious for other people's thoughts. I plan on breaking out Calman tonight and taking some readings, unless something unforeseen happens. The pictures are slightly overexposed, but man, that Deadpool picture just looks wrong.
I and others had noticed a slight undersaturation (I suggested between 5-10 on color even if that's probably inaccurate, but it feels better perceptually) but in your case it's very extreme judged by your pictures. The difference is much more subtle here, it took me a while to notice it. Not sure what causes such a drastic change your side.
Like Javs, I would say that the pics of my curve looks more accurate than your gamma D for Deadpool. Check your gamma D settings, with contrast set to 0 on the JVC you should have bright gamma at +2, picture tone should be around 10 on your screen size. Also check the color, tint etc are zeroed out.
Regarding the slight undersaturation here, it seems to not be as bad in all titles. For example, in Pacific Rim I need +3 on color at most, more than that it's too hot. In other titles, I can go up to 5-10 to perceptually match my Gamma D. But it's never as drastic as your difference. I'll probably settle for around +3 on color to be on the safe side until I find the cause/solution.
I'll try to post pictures showing the changes when I have the time.
I'll also be using the 4000nits roll-off (third file), there is no cost to the overall picture brightness and it does resolve extreme content better.
Originally Posted by nathan_h
Agreed. This appears to be a solution for HDR10 content regardless of source.
Where did you see this discussion?
That's the post.
You're not the only one who thought that -- sometimes seemed to be the case to me -- though it should be possible to confirm with measurements.
We discussed this with Chad B in the Calman thread I linked to at the beginning of this discussion (the post with BREAKING NEWS mentioning mkoper's find with the matrix, which I simplified using the screen offset method)
My measurements show an undersaturation on red and a lack of tracking, but I don't know if it's my Spyder that has gone wrong, my panel having shifted, or the effect of gamma D. I'll investigate this further when I have the time now that I know that it's not only here.
Originally Posted by Chad B
Yes I've been working on a RS420 and making a custom gamma curve for HDR with outstanding results. Mkoper and Manni's multiplier methods have been a tremendous help. I will be able to do the same on the RS400/500/600.
BTW, on the new X20 series there is no gamma D; it is a new gamma preset that is much better tuned from the factory, so even without a custom gamma they are pretty good in HDR mode. Their autocal software (v 9.00) has a problem though and needs a fix.
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Thanks for the feedback, have you noticed the slight undersaturation as well? Do you have an idea what causes it? I posted a longer reply in the Calman thread. I know you've aimed for clipping at 1000nits, now that I'm using a softer roll-off which doesn't seem to cost much in terms of overall picture brightness I might try this in my next attempt, that might help with color saturation. That's a multiplier of 5 for me, it might help those with a larger screen / less gain.
Regarding the new models, is the bug with the dark gamma control fixed, so can you adjust it as needed without raising the black floor / killing on/off contrast?
One last thing, anyone has a working irule code for the custom gamma 1-3? I tried those from the JVC remote control guide, they don't seem to work which is a bummer. All the other codes work, but not that one. Anyone with tried and tested working codes for custom gamma 1-3? The code for the gamma button works, so that's useful, but it's two presses when using custom1, and four when using custom3, and I'm lazy