Thread: Redlogfilm to Redgamma2 in resolve

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  1. #1 Redlogfilm to Redgamma2 in resolve 
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    Hello,

    is there a way to get a standard lut to apply Redlofilm to redgamma2 in Resolve?

    I can find on RED website the link to donwload the lut Redlogfilm to redgamma3 but not 2.

    Thank you so much
    Pierre
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  2. #2  
    Senior Member rand thompson's Avatar
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    Pierreb,



    Why not RG3 or RG4 which the Red Lut Kit supports?
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  3. #3  
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    You mean from R3D's? RedLogFilm is part of the Raw playback menu in the Config settings. You can also override the project settings and do it from the Raw panel on the Color page. It's not a LUT per se, it's color science that's built into the program.
    marc wielage, csi colorist/post consultant daVinci Resolve Certified Trainer
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  4. #4  
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    not in redgamma3 or 4 becaus ethe dop shot in redgamma2

    The problem comes from workflow with vfx. we work in redlogfilm so, i need to transform back the vfx shots in redgamma2.

    in the meantime i found that https://github.com/videovillage/RED-Conversion-LUTs

    the result is almost good but i can see a slightly difference between the original redgamma2 from RED and this one. Plus, when i apply the lut in Resolve, the lut puts a litmit to the low level light, but when i apply the redgamma2 in the raw settings (on original footage) there is no limitation in the low level.
    I wonder if there is bad luts out which could make more damage than advantages.
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  5. #5  
    Senior Member rand thompson's Avatar
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    Plerreb,


    Maybe try "LutCalc". I haven't used it in a long time but maybe you can build a Lut of your own with it.


    Go to "Run LUTCalc" at the top of the page I used the "LUTCalc Online" method
    https://cameramanben.github.io/LUTCalc/






    You might want to create a "1D" Lut since its the Gamma you want to change as with the "Red Lut Kit" Luts


    Last edited by rand thompson; 12-17-2019 at 06:23 AM.
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  6. #6  
    Senior Member rand thompson's Avatar
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    Pierreb,



    Here is a Redlogfilm to Redgamma2 1D Lut I made with LUTCalc using the default settings.


    1D Lut "Pierre_RLF_to_RG2.cube"

    https://www.dropbox.com/s/4f9qjxhr50..._RG2.cube?dl=0


    Original image in "Legacy" Workflow in Redcine-X







    Image with RLF to RG2 1D Lut applied to Dragoncolor2/ RLF image in Resolve






    Or Just change it from RedLogfilm to Redgamma2 in the "Camera Raw"Tab







    Redcine-X dragoncolor2/RG2






    Resolve Dragoncolor2/RLF with 1D Lut "Pierre_RLF_to_RG2.cube" applied






    Change from RedLogfilm to Redgamma2 in the "Camera Raw"Tab


    Last edited by rand thompson; 12-18-2019 at 08:35 AM.
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  7. #7  
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    thanks a lot Rand, that's really great.

    but i got a problem, when i apply the lut, the blacks are limited, i can't drop them lower than a certain limit.
    not sure if it's clear, so here is a screenshot
    on the right the original raw footage in Redgamma2, we can see that i can drop the blacks to 0
    on the left, the DPX from VFX with LUT applied. I can't drop the blacks lower than we can see on the picture.
    That's normal ?



    thank you again
    Pierre

    ps: on the dpx footage i don't have access anymore to the 'camera raw' settings as we lost those metadata in the renderings
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  8. #8  
    Senior Member rand thompson's Avatar
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    PierreB,



    Here's a rather long tutorial on using an .iLUT(LUT format designed by Iridas for Speedgrade NX and is still in use for Adobe Speedgrade. The iLUT format uses math scripting, rather than a list of values, to control color corrections)

    Part 1

    In LutCalc again use these settings instead of the ones for 1D lut above.




    here it is here
    https://www.dropbox.com/s/j2plazj255..._RG2.ilut?dl=0



    I created a Dragoncolor2/Redlogfilm image in "Legacy" Mode in Redcine-X to export a .R3D Frame from to import into Resolve.







    In the Camera Raw settings in the Project settings use the settings in the first screenshot if you know that all of your .R3D files are already Dragoncolor2(Or whatever Gamut)/ Redlogfilm. Use the settings in the second screenshot if you are not sure that all of your .R3D files are Dragoncolor2(Or whatever Gamut)/ Redlogfilm.





    Last edited by rand thompson; 12-20-2019 at 02:40 PM.
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  9. #9  
    Senior Member rand thompson's Avatar
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    Part 2


    I had to breakup "Part 2" into two parts so now there's a "Part 3"


    Next, In the the "Color Management" Project Settings change the "3D Lookup Table Interpolation" to "Tetrahedral"( for best quality from Luts). Then click the "Open Lut Folder" button






    Now Copy and paste the "PierreB_RLF_to_RG2.ilut" into this folder





    Once you have placed it here, exist out and click the "Update List" button. This will cause your computer to freeze up for a little while but you will know that its finished when you see the "Save" button light back up.









    Part 3 Next!!……...
    Last edited by rand thompson; 12-24-2019 at 09:36 AM.
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  10. #10  
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    thanks Rand, you are amazingly crazy good :)

    i'm away for a few days but i'm going to try asap

    thank you again for those info and tuto !!!
    Pierre
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