- Posts: 23
- Joined: Tue Jan 26, 2021 1:25 am
- Real Name: George Mallard
Duckpaddle wrote:Q1) Does "4.6K Film" refer to the raw file (.braw) from either a BMPCC 4K or 6K?
Q2) Is there a difference between the image sensor color response for the BMPCC 4K and a BMPCC 6K?
I think the original 4.6K Film LUT was for CinemaDNG files -- or at least that's how I saw it used when making proxy files for editing. I think the color response is different, but it's said to be improved with the later cameras. I can say the newer cameras have less noise overall (all things considered).
You know, it's possible not to use a LUT at all and still color-correct projects shot on Blackmagic or Red or Alexa or whatever you have. It is mandatory to use the manufacturer's color science, and I keep a close eye on the contrast curve and so on early in the correction. Another method is to use an early node for a Color Space Transform, and go from the Input Color Space & Gamma, and Output Color Space & Gamma. You could go from BMPCC 6K -> Rec709 if you wanted to.
Honestly, I've probably done 14-15 Blackmagic feature projects, and I just eyeballed it and used curves and LiftGammaGain and got there by hand -- no LUTs, no transforms, no color management, all just display-referred (but we were only delivering Rec709). The cameras actually look pretty good right out of the box. It does help to take time and experiment. The manual also has lots of useful information. Read the section in the v17 manual starting on p. 149, "Camera Raw Settings -- Blackmagic Raw," and it goes into it in great detail.
Part of the power of Resolve is that it gives you 3 or 4 different ways to correct Raw material. You can do it from scratch, you can do it with Color Management, you can do it with CST nodes, you can do it with LUTs... the basic method is up to you, and there's pros and cons with each method. It does help to shoot a color chart reference with known values -- many use the XRite Color Checker Video, but I'm a bigger fan of the DSC Chroma Du Monde -- and learn how to interpret the values on scopes.