Color Space Settings

Principles

They key to getting good results with MBR Color Corrector 3 and some output other than Rec. 709 is prevent Adobe Premiere Pro / After Effects from performing any color space conversions behind the scenes. This way those conversions can be performed by the MBR Color Corrector plugin.

Premiere Pro

In Premiere Pro it is impossible to turn off color space conversions. The trick is to tell Premiere Pro that the footage, sequence, and export working spaces are all the same. This means that Premiere Pro won't think that needs to convert the footage at any stage.

If you want to produce 'normal' footage then follow the "Rec. 709" section below, if you want to produce HDR footage then follow the "Rec. 2100 HLG" section below:

Rec. 709

If you wish to produce 'normal' HD footage (Rec. 709)...

In the Project window, right click on the clip

Modify > Interpret Footage...
Towards the bottom of that window set "Color Space Override" to "Rec. 709"

In the Project window, right click on the sequence

Select Sequence Settings... from the menu
In the Video section of the Sequence Settings window change the "Working Color Space" to "Rec. 709"

When you apply the MBR Color Corrector effect to the clip

Set the "Input Transfer Function" to match whatever you set the camera to
Maybe set the "Input Levels" to "Full" (this can depend on if you recorded footage internally or via an external recorder)
Set the "Output Transfer Function" to "Rec 709"
Set the "Output Levels" to "Full" (Premiere Pro wants the black level to be 0.0 and white to be 1.0)

When you come to Export a sequence

In the "Export Settings" window
If "Match Sequence Settings" is selected, then it all should be good

Rec. 2100 HLG

In the Project window, right click on the clip

Modify > Interpret Footage...
Towards the bottom of that window set "Color Space Override" to "Rec. 2100 HLG"

In the Project window, right click on the sequence

Select Sequence Settings... from the menu
In the Video section of the Sequence Settings window change the "Working Color Space" to "Rec. 2100 HLG"

When you apply the MBR Color Corrector effect to the clip

Set the "Input Transfer Function" to match whatever you set the camera to
Maybe set the "Input Levels" to "Full" (this can depend on if you recorded footage internally or via an external recorder)
Set the "Output Transfer Function" to "Rec 2100 HLG"
Set the "Output Levels" to "Full" (Premiere Pro wants the black level to be 0.0 and white to be 1.0)

When you come to Export a sequence

In the "Export Settings" window

If "Match Sequence Settings" is selected, then it all should be good
If "Match Sequence Settings" is disabled, then you want to check a few settings are correct:

In "Export Settings:" section: Set "Format" to "H.264" or "HEVC (H.265)"
In the "Video", "Encoder Settings" section: Set "Performance" to "Software Encoding"
In the "Video", "Encoder Settings" section: Set "Profile" to "High10"
In the "Video", "Encoder Settings" section: Select "Rec. 2020 Color Primaries", "High Dynamic Range" and "Include HDR10 Metadata"
In the "Video", "Mastering Display Color Volume": Set "Color Primaries" to "Rec2020"

Rec. 2100 PQ

In the Project window, right click on the clip

Modify > Interpret Footage...
Towards the bottom of that window set "Color Space Override" to "Rec. 2100 PQ"

In the Project window, right click on the sequence

Select Sequence Settings... from the menu
In the Video section of the Sequence Settings window change the "Working Color Space" to "Rec. 2100 PQ"

When you apply the MBR Color Corrector effect to the clip

Set the "Input Transfer Function" to match whatever you set the camera to
Maybe set the "Input Levels" to "Full" (this can depend on if you recorded footage internally or via an external recorder)
Set the "Output Transfer Function" to "Rec 2100 PQ"
Set the "Output Levels" to "Full" (Premiere Pro wants the black level to be 0.0 and white to be 1.0)

When you come to Export a sequence

In the "Export Settings" window

If "Match Sequence Settings" is selected, then it all should be good
If "Match Sequence Settings" is disabled, then you want to check a few settings are correct:

In "Export Settings:" section: Set "Format" to "H.264" or "HEVC (H.265)"
In the "Video", "Encoder Settings" section: Set "Performance" to "Software Encoding"
In the "Video", "Encoder Settings" section: Set "Profile" to "High10"
In the "Video", "Encoder Settings" section: Select "Rec. 2020 Color Primaries", "High Dynamic Range" and "Include HDR10 Metadata"
In the "Video", "Mastering Display Color Volume": Set "Color Primaries" to "Rec2020"

After Effects

It is easy to tell After Effects not to perform any transfer function / color space conversions.

File > Project Settings...
Color
change "Working Space" to "None"