Thread: REDCINE-X ACES colorspace?

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  1. #1 REDCINE-X ACES colorspace? 
    What Colorspace is export when using the ACES Export Pipeline to export exrs?

    When I export exrs from REDCINE-X pro and bring said exrs into Nuke they seem to be in a double REDWideGamut colorspace. I have to do two AP0 to REDWideGamut -linear OCIO nodes, then convert to REDLog3G10, then the standard rec709 ODT LUT to match what I see in REDCINE-X Pro.
    vs
    When I bring the same R3D file into nuke it comes in as REDLog3G10 as expected.

    I don't seem to have any control over the exr colorspace in REDCINE-X Pro, unless I am doing something wrong.

    footage is from RED Weapon Gemini 5K S35, if that matters

    Thanks
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  2. #2  
    Senior Member rand thompson's Avatar
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    Aidan,

    I don't know about Nuke but in Davinci Resolve it brings the EXR files already transformed like all other "Raw" files. However, I might not fully understand your specific workflow.

    Redcine-X






    Davinci Resolve



    How the EXR file looks when it comes into Resolve



    The Upper and Lower white lines are 940 for highlights and 64 for shadows for "Video"

    Tone-Mapping looks ok but could be better but Gamut-Mapping for yellow for broadcast looks awful







    1) Changed "Offset" to 28.40



    2) OFX "Gamut Mapping" ( Includes Tone and Gamut Mapping adjustments)



    3) Plus 4 Log "Midtone"




    Better Tone-Mapping and Gamut Mapping


















    Redcine-X Original




    Davinci Resolve EXR

    Last edited by rand thompson; 03-02-2021 at 10:28 AM.
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  3. #3  
    Thanks for the response Rand. I have yet to learn Resolve, so I'm not sure what you are doing to make it match. The main question is how do I know what colorspace the exr is in?
    I guess I need to try the nuke forums.
    Time to learn Resolve!
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  4. #4  
    Senior Member rand thompson's Avatar
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    Aidan,

    Just look under "Preferences" then "Monitoring Out". Yeah, Resolve is great! Let me know if I can do anything to help.

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  5. #5  
    Senior Member rand thompson's Avatar
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    I updated post #2 with a screengrab of the exact settings changes I made to the EXR file
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  6. #6  
    Thanks! that should help for jumping into Resolve.
    For the record, I was doing it wrong in nuke. :-)
    Got confused between "REDLog3G10 - REDWideGamutRGB" and "Curve - REDLog3G10"
    Here's how those exrs out of REDCINE-X should be converted in nuke:
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  7. #7  
    Senior Member rand thompson's Avatar
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    Alright then Aidan!

    Here's some Netflix guidelines on working with Aces in Davinci Resolve for HDR content

    https://partnerhelp.netflixstudios.c...-Resolve-ACES-
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  8. #8  
    Senior Member rand thompson's Avatar
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    Here's another example with an over-exposed image at 800ISO. forgive me that I don't include all the scopes and correction settings from last time.

    Redcine-X








    Davinci Resolve




    Before Correction Nodes






    After Correction Nodes







    Last edited by rand thompson; 03-03-2021 at 08:24 PM.
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  9. #9  
    Senior Member rand thompson's Avatar
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    Here's another example with an under-exposed image at 800ISO with a raised ISO of 2500.I think its best to change the Raw ISO in Redcine-X than to use alot of gaining up in Resolve.

    Footage provided by Luigi Valtulini

    Redcine-X













    Davinci Resolve









    His skintone looks ok, but Her skintone looks a little funky.

    Last edited by rand thompson; 03-05-2021 at 02:22 PM.
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