Color data not being properly encoded

When editing in the Color tab, what noise there gets exaggerated on export. On playback and in editing, as you can see in the example it looks fine compared with the export version.

In filming, I am using low ISO, aperture, and high shutter-speed relative to the available lighting (on purpose) which resulted with a significantly lower volume of luminance data.

I just don't understand why if I'm looking at the image on my screen editing it with no obvious artifacts then when I export the file is essentially destroyed.

Troubleshooting:
I thought perhaps it was because I was taking a 60fps video and using it in a 23.976 project but exporting it from a 60fps project doesn't solve the problem.

Tried re-enabling the other RGB channel groupings to no effect on export.

Export settings:
Version 18.5
Quicktime, H.264 - Native
1920 x 1080
23.976fps
Auto 'Best' quality

One way which the preview in Resolve and rendered files might differ is that by default, Preferences > User tab > Playback Settings > Performace mode is enabled. Performance mode will degrade the preview image processing if needed to provide smooth playback. It doesn't affect rendered files.

You could try disabling it and see if it makes a difference.

Preferences > User tab > Playback Settings > Performace mode

Didn't make a difference.

Update:
I now realize it doesn't have to do with the file nor the origin. It does seem there appears to be a connection with luminance detail.

When editing in the Color tab, what noise there gets exaggerated on export. On playback and in editing, as you can see in the example it looks fine compared with the export version.

In filming, I am using low ISO, aperture, and high shutter-speed relative to the available lighting (on purpose) which resulted with a significantly lower volume of luminance data.

I just don't understand why if I'm looking at the image on my screen editing it with no obvious artifacts then when I export the file is essentially destroyed.

Here's another example.

I am performing a red pass - only the red channel of the red group is on - yet on export cyan is added in and so are some obvious white and black artifacts as well.

Green pass adds magenta.

I literally just did this the other day and had none of these issues.

The real issue here is that the export does not look the same as Davinci Resolve. You can see it immediately upon clicking 'Render' when the preview image appears. It looks just as the export, with artifacts and added color noise.

All the footage from the other scene looked fantastic and had no visible differences between the export and what I was seeing inside Resolve.

Is the issue still there if you export using a mezzanine codec like DNxHR, ProRes or CineForm instead of H.264?

What hardware are you running Resolve on?

mezzanine codec
hardware

It's okay if you don't know the solution. I appreciate your help.

Well I asked about hardware because users with computers that don't fulfill the minimum requirements for DaVinci Resolve have reported artefacts in rendered files.

And he asked about trying a mezzanine codec, since the heavy compression of H.264 can worsen hidden noise.

heavy compression of H.264 can worsen hidden noise.

If at all, I'm sure it's negligible to me, a noob, by all your fancy expertise eyes and monitors.

Do you know what a green pass is? Try it on your footage and tell me what you get. Try it on a 1080p HD image. Just run only the channel of one of the RGB groupings, just the red of the Red channel, for example and render it. Just sample a little square.

I'm wondering if it has to do with the data volume of the cameras I used. The thing is, I did it with footage from the same cameras earlier without issue and suddenly I'm getting back these reverse-color noisy images.

It sounds like some kind of codec issue. Render to a different format as previously suggested and ignore the red/green channel renders as they are meaningless in this context. Also if you upload a Resolve project file someone can take a look at it for you and see if there are any obvious issues with it.

Now that the images in this thread have been changed, it looks to me like the first image in the first post was made using a low timeline proxy resolution and the render uses full resolution. That doesn't explain the red image but there can of course be multiple issues.

I know just from reading what you're suggesting that it won't work. I'm not a complete noob.

Regardless, I ended up just doing multiple passes to manage the expanded noise. It worked out fine.

Thanks for your attempts.

I realized I can pass everything using the Qualifier but also still use the exposure faders to adjust everything.

When editing in the Color tab, what noise there gets exaggerated on export. On playback and in editing, as you can see in the example it looks fine compared with the export version.

In filming, I am using low ISO, aperture, and high shutter-speed relative to the available lighting (on purpose) which resulted with a significantly lower volume of luminance data.

I just don't understand why if I'm looking at the image on my screen editing it with no obvious artifacts then when I export the file is essentially destroyed.

Troubleshooting:
I thought perhaps it was because I was taking a 60fps video and using it in a 23.976 project but exporting it from a 60fps project doesn't solve the problem.

Tried re-enabling the other RGB channel groupings to no effect on export.

Export settings:
Version 18.5
Quicktime, H.264 - Native
1920 x 1080
23.976fps
Auto 'Best' quality

It's entirely possible that Davinci Resolve can not export zero values on the RGB group.

All I need to do is pass it in the Color tab and all the weird noise disappears. I think there needs to be something there in order for the file to render properly. I can just turn them off in the RGB Mixer.