Curves Color Correction: Avid Symphony vs. DaVinci Resolve

What about lum mix control in resolve? Wouldn’t it make resolve behave similarly to symphony from the POV of a curve not influencing the other two?

Hi 72mm,

Unfortunately not. If I make a change in the green curve, it’ll effect the R & B channels as a result of how it processes the image. The Lum Mix slider will only ‘mix back’ the changes we physically make the curve itself… but it won’t change the internal processing of how the RGB channels influence each other.

You’ll find this behavior throughout Resolve. Eventually, I learned to stop letting it annoy me and learned how to make slight tweaks that take advantage of this behavior. So – sometimes this behavior slows me down and sometimes it speeds me up.

One last note – here on MixingLight we prefer first and last names in the comments. You can go to Member Home > Your Profile and update those details there. Thanks!

I just double checked with the scopes and, in fact, with Lum Mix set to 0, curve adjustments do not influence other channels (if the curves not ganged together of course). For clarity sake I am not talking about the intensity slider underneath each of the curves but the Lum MIx control in the Primaries or the Color Wheels panels.
Regarding the name, the forum system does not seem to respect the MixingLight account settings, it seemed to use my twitter settings for the previous post

Dmitry,

Ah yes, this message board is tied to Disqus – which is a separate log-in. Sorry about that confusion.

RE: Color Wheels Lum Mix – Thanks for pointing that out! I’ll dig into it. It’s a control I never use so I’m intrigued by your findings.

Dmitry,

After further experimentation – the Lum Mix control will negate the ‘interference’ between color channels when grading – but it runs that node as a pure RGB node. All Y-only moves will be ignored – including the Luminance Custom Curve and all Y moves in the Primaries.

Thanks for pointing this out.

As I ponder it, I might be inclined to do this only the 10% of the time when I truly want to isolate a color channel while make changes in the tonal range (such as in the 3-way, LOG or Custom Curves). But for that 10%, it’ll be useful.

The other thing to point out, you can use the Offset controls for pure RGB isolation without channel ‘cross-talk’. But it’s a ‘setup’ control (moving the entire channel up or down).

Cool stuff. Thanks for leaving this comment. I’ll probably turn this into an Insight.