Here are two LUTs made to convert S-Log 3 to Rec.709.
Calibrated on footages from Sony A7s II, FS7 and F55.

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73 LUTs color grading pack : http://luts.iwltbap.com
One free LUT (LOG and Rec.709) : http://luts.iwltbap.com/#freeware
Free real 4K film grain : http://luts.iwltbap.com/#freegrain