Camera Raw: Add Rec 709 to LUT color spaces in new enhanced profiles

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The new enhanced profiles can include LUTs, but the most common color space for existing LUTs, Rec 709, is omitted: 



There are thousands of Rec 709 LUTs available for video color grading, and allowing Rec 709 LUTs in enhanced profiles would let people achieve the same look for their video and still images.

Note that it would be necessary to include two versions of Rec 709 for gamma 2.2 and 2.4, since those are both widely used.
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John R. Ellis, Champion

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Posted 3 months ago

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Andrew Rodney

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Where are you accessing that screen capture? 
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John R. Ellis, Champion

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I don't have any experience with 3D LUT Creator.  I've used Lattice a little for technical transforms of LUTs. 
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Andrew Rodney

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Thanks, interesting video's on Lattice. I have to see if the $99 version of 3D LUT creator is going to cut it for starting out or, their Standard version which is on par price wise with Lattice:
https://3dlutcreator.com
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Cameron Rad

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Andrew, if you're comfortable with command look into this. From the creator of Lattice.

https://github.com/gregcotten/pylut

https://www.jasonmyres.com/converting-3d-luts-for-resolve-lustre-and-nuke-using-pylut-in-osx
(Edited)
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Cameron Rad

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Also Lattice isn't a WYSIWYG freeform LUT editor like 3DLUTCreator. By that I mean it's not such that one can select a range of colors and modify them. It's more a GUI for LUT math. Similar to LUTcalc https://cameramanben.github.io/LUTCalc/LUTCalc/index.html but in my opinion far more intuitive and provides a bit more options. 
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Andrew Rodney

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Thanks ; more and more, 3DLUT creator seems like the best option for me.
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John R. Ellis, Champion

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As an indication of the need for Rec 709, this LR feature request for the ability to use LUTs in LR has 97 votes:
https://feedback.photoshop.com/photoshop_family/topics/id_love_to_get_the_ability_to_use_3d_luts_in_...
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Andrew Rodney

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Minor point: Melissa RGB which is a variant of ProPhoto RGB has a 2.2 TRC but isn't the internal color space for processing which has no name and has a 1.0 TRC. Melissa RGB is only used for the RGB values and Histogram (when no soft proof profile is selected as in LR). 
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Cameron Rad

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Hi Andrew,

Do you know if it's 2.2 or sRGB? The TRCs are very slightly different, linear section near bottom part.

The reason I ask is in the enhanced profile documentation it states there are two encodings for profile look tables, 0=Linear and 1=sRGB
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John R. Ellis, Champion

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"Melissa RGB which is a variant of ProPhoto RGB has a 2.2 TRC but isn't the internal color space for processing which has no name and has a 1.0 TRC."

Right, thanks for the correction.
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Andrew Rodney

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Just the same sRGB TRC of 2.2, not a simple gamma curve.
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Andrew Rodney

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Better yet: Think of it as sRGB with ProPhoto RGB primaries.