Tom Evans February 23, 2018 Share February 23, 2018 I have started to look at the Davinci Resolve color management, and it looks promising. But I have noticed that setting the input color space to Alexa Log C for my source footage or applying a Alexa log to rec709 LUT actually yields quite different results. What is the reason for that? A mathematical reason I guess, but why isn't the input color space option set up to mirror the Alexa Log to Rec709 LUT perfectly as that is what is provided by the camera manufacturer? I mean, they provided this LUT because they want footage shot on Alexa to be transformed that way right? Link to comment Share on other sites More sharing options...
Amada Daro February 23, 2018 Share February 23, 2018 1 hour ago, Tom Evans said: I have noticed that setting the input color space to Alexa Log C for my source footage or applying a Alexa log to rec709 LUT actually yields quite different results. That is true. The LUT is made to make your footage look nice while a simple color space transform is made to take your footage from one color space to another non-destructively. Look at the curves below to see the difference. 1 1 Link to comment Share on other sites More sharing options...
Alfonso Merino March 3, 2018 Share March 3, 2018 Have you tried luminance mapping? Link to comment Share on other sites More sharing options...
Amada Daro March 3, 2018 Share March 3, 2018 Luminance mapping bends the top end of the curve. Link to comment Share on other sites More sharing options...
Alfonso Merino March 3, 2018 Share March 3, 2018 (edited) The ARRI LUT does that too... But if Tom wants to get a closer result to the LUT with RCM that's a way. First pic is ARRI LUT and 2nd RCM Edited March 3, 2018 by Alfonso Merino 1 Link to comment Share on other sites More sharing options...
Alfonso Merino March 3, 2018 Share March 3, 2018 (edited) 2 hours ago, Alfonso Merino said: Have you tried luminance mapping? I meant the "Tone Mapping" in Resolve, Edited March 3, 2018 by Alfonso Merino Link to comment Share on other sites More sharing options...
Paul Dore March 3, 2018 Share March 3, 2018 This plugin has the option of a technical LogC Alexa Wide Gamut to Rec.709 transform, but with the additional ability to roll off the highlights into display space. 3 Link to comment Share on other sites More sharing options...
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