How to create a custom LUT with a reference test card

[Shirozina]

I have a standard 24 patch card but there are also better ones with more colours like the digital SG. Is there an application you can shoot these cards with and then create a LUT from as you would profiling a stills camera ?

 

[morgan_moore]

Resolve?

 

[Samuel H]

MB Looks allows you to create a LUT out of any color correction or grade that you apply on Premiere. It does not create the correction that makes the chart look perfect, though: you'd have to do that on your own.

 

[morgan_moore]

resolve has click to card.

 

[Noel Evans]

Echo, resolve. Im used to it.

 

[Shirozina]

Just checked Resolve but only the full version allows you to create a 3DLUT. I can run the process in lite but the adjusted colours on the 24 patch X-rite test card didn't look very accurate to be honest when applied to Slog2 + S-Gamut. I'm assuming it needs many more colours to generate a good profile.

 

[Samuel H]

If you are using sgamut, you'll need an exposure range on the chart: sgamut is very nonlinear, it shows obvious hue changes when you open up or close the iris.

 

[Nick_Shaw]

Just checked Resolve but only the full version allows you to create a 3DLUT

That is not correct. Resolve Lite can export 3D LUTs. I think you are getting confused by the fact that there is no Stereo 3D support in Resolve Lite. Different kind of 3D!

 

[Shirozina]

If you are using sgamut, you'll need an exposure range on the chart: sgamut is very nonlinear, it shows obvious hue changes when you open up or close the iris.

A colour space that changes hue with exposure doesn't seem an ideal choice - are there any advantages with S-Gamut over the other colour profiles?

 

[Shirozina]

It wasn't an option on the pull down menu when right clicking the clip which is the way it was shown in a tutorial for an earlier version - has the procedure changed for the latest version?

 

[Shirozina]

Just found it by enabling the clip in the advanced view mode ( only been using Resolve for an hour.....) - Thanks Nick!

 

[Samuel H]

A colour space that changes hue with exposure doesn't seem an ideal choice - are there any advantages with S-Gamut over the other colour profiles?

The only one I know: that there are official Sony LUTs for sgamut. But if you shoot sgamut basically it becomes mandatory to use them, it's so difficult to work with sgamut without using those LUTs... (lots of people complain that slog2 leads to ugly colors; I think most of them are using sgamut, and blaming slog2 for sgamut's faults).

I never use sgamut. I use this.

 

[Shirozina]

Testing a lot of different settings today and have come to the conclusion that the cleanest looking and most accurate and natural colours come from turning profiles off and using the creative styles with contrast and sharpness down to -3 and saturation to taste. The cine styles using MOVIE, PRO or CINEMA just keep pumping up reds or greens or making the sky cyan. They look horrible. Not tested banding yet ........