Can you colour change white sections?
Posted:
Mon Jul 12, 2021 4:34 amby SlAM113
I am new to black magic and I am trying to colour change the white sections of a video I took in the fog. I have been able to select the white in the video but when I play around with the hue and gamma nothing changes. See the video below
https://imgur.com/a/ESW108q
Re: Can you colour change white sections?
Posted:
Mon Jul 12, 2021 10:37 amby CodeTech
I've also been playing around with this.
The best I've found is to use a qualifier in HSL mode, and select from 0 to about 1.5 in saturation, since white won't have saturation.
Once it's selected, any color changes in the color wheels will easily change the color, since it's white.
In my case I was able to key out a white backdrop just like a green screen... but it's very touchy to find just the right levels.
Re: Can you colour change white sections?
Posted:
Mon Jul 12, 2021 12:52 pmby shebbe
I think you might have graded the footage to clip the sky after the colorwheels adjustments happen so no matter what you do in the colorwheels it will stay white. I see you have use curves applied on that same node. The curves get applied after the colorwheels / primary adjustments. You might want to check or reset that and apply it on a node after your current.
The reason I think that's the case is because your qualifier isn't set to the maximum luminance range so there is still color data in that sky.
If for whatever reason you want those curves to make the image look like that but then after it change the white you can make a seperate qualifier HSL adjustment on a node after your current node.
Hope that helps.
Re: Can you colour change white sections?
Posted:
Tue Jul 13, 2021 12:27 amby CodeTech
My answer, above demonstrates that I didn't view the linked video.
Sorry.
Re: Can you colour change white sections?
Posted:
Tue Jul 13, 2021 5:18 amby Peter Cave
SlAM113 wrote:I am new to black magic and I am trying to colour change the white sections of a video I took in the fog. I have been able to select the white in the video but when I play around with the hue and gamma nothing changes. See the video below
https://imgur.com/a/ESW108q
You are not using the correct controls. Perhaps doing some of the BMD Resolve training may help you understand the toolset.
Gamma only affects MID tones not highlights. (there is some overlap)
HUE will affect any colours but white has no saturation which is why you see no effect.