Originally Posted by KarlKlammer
Thank you for your post, Jim!
1) It is not the sunburst or corona, that I am concerned about in this scene. It is the loss of detail in the lower part of the image. I can't distinguish the 'crystals' from the ground or the sunburst anymore.
2) I would think that my JVC NX9/RS3000 would be capable of processing more than 8bit internally.
3) When I raise Display Max Light, I can see cables or pipes appearing in the red background on the left.
4) The NX9 is not capable of displaying full saturated BT.2020 red. It mostly reaches DCI-P3.
5) I feel the image looks too flat in these scenes. Raising Display Max Light gives the ocean a more pronounced appearance and also helps to give the image more depth.
It looks like from one of your screen shots you are not on the latest (042119). I suggest you update to 042119 and see if there is any improvement (which there should be).
I should also note that I am on a pre-release of the new Dynamic Tone Mapping algorithm with the improved low to high blend. This could be part of the difference you are seeing. I could revert to 042119 but I am a bit lazy tonight. Maybe later if I get pushed to do it and test again. Just note that what I am evaluating is what will be available soon in a new release.
1) 00:18 of The Meg: I don't feel I have loss in detail for the crystals versus the surface. I took a picture to post here. I hate posting these types of pictures as they seem to never be as good as the image on the screen, but I think this shows that the crystal detail remains. I will put the pictures in another post so they do not propagate with any responses.
2) 01:13 of The Meg: While we are going to look further at this scene, I can see the detail on the wall behind the man on our RS4500. It looks like one might expect looking through a haze. The fact that you cannot see this detail could be a setting issue, or something about your setup. I took a picture of this as well but it did not come out as well as I hoped. Will post it in another post as well. NOTE: I do agree we should look at this scene and hopefully improve it.
05:23 and 05:56 of The Meg: As I mentioned these scenes are very similar to a scene we already have on the "tune up" list. So hopefully we can carve out some more detail.
The internal pipeline precision of the nx9/RS3000 (and nx7/RS2000) and RS4500) are all excellent and exhibit none of the banding issues we have seen in other brands.
3) Sounds like you might need to have a higher setting for Display Max Light if increasing it improves these pictures. The nx9 has a 2100 lumen rating. Depending on your screen size, gain, whether you have an anamorphic lens and if it is perforated/weave, you should likely have a Display Max Light around 400 maybe higher. For our 3000 lumen RS4500 on a 14 foot diagonal 2.4 aspect Stewart Studiotek 130 I have Display Max Light set to 400.
4) So like our RS4500 the fully saturated Rec 2020 red at 1:13 will get clipped and affect the image.
5) Again sounds like you might want to use the higher Display Max Light.
Everything about Dynamic Tone Mapping is a balancing act. We want each scene to be as bright as it can be, but that can mean less detail in highlights. You can use Static Tone mapping which will give you more detail in the sky, but a significantly darker over-all brightness for the movie. Or use DTM and have each scene optimized - which is a trade off of highlight detail (e.g. the clouds), and the brightness of the main portion of the image.
For the clouds at 05:23 and 05:56, I agree that they are too bright and we will see if we can tone them down (pun intended) a bit. We will look at the saturated red haze as 01:30 as well. I really don't see any issues in the scene at 00:18, but we can look into that as well and see if we can improve it.
Thanks again for the feedback. Dynamic Tone Mapping is, as I have said, a work in progress and everyone's feedback can help us continue to improve it.
Pictures in my next post.