Color temperature setting / Whitebalance

[martinnoweck]

Hi,

I have a question regarding the color temperature settings in Scratch - do I set the color temperature working native with R3D in the part of the interface which is very similar to the old REDCINE (the RED tab, where I can set the ISO, set whitebalance, apply a basic curve, etc.) or do change it in the primary color grading tool?

Best wishes,
Martin

[Hans von Sonntag]

I'm not familiar with Scratch but in other grading tools I know it makes sense to set the colour temperature in the RED SDK to something that meets your desired look closest. E.g. 5600K for outdoor, 4.600K when a outdoor scene is meant to be cool (same as 81EF when shooting tungsten balanced film) and 3.200 K for tungsten lit scenes.

Form there anything else is better done with the primary of of the host application.

Hans

[mikeburton]

There's not much right or wrong here. You can choose the white balance to help set a look or do it with Scratch toolset. In the end it's all about the look you desire. I Always look at it as just a starting point and find a nice neutral white balance and then achieve the "look" I want within the Scratch tools.

[jake blackstone]

Sometimes doing metadata adjustment can be problematic, if the same shot shows up in multiple instances. Adjusting one will affect all other ones. That's why, if possible, just do an adjustment in primary grade. You can also copy and paste the settings. Not so much with metadata...

[Daniel Esperanssa]

Managing and tweaking RED metadatas in Scratch is a good way to first "balance" the shots prior to building a color grade at the top.
Since the current 5.2 release, Metadata adjustments (WB, ISO, F-LUT, Curves etc) can be set either for the shot itself but also for any instance where the shot is used. So each instance will have it's own metadata tweaks.

[jake blackstone]

Managing and tweaking RED metadatas in Scratch is a good way to first "balance" the shots prior to building a color grade at the top.
Since the current 5.2 release, Metadata adjustments (WB, ISO, F-LUT, Curves etc) can be set either for the shot itself but also for any instance where the shot is used. So each instance will have it's own metadata tweaks.

Is that new in 5.2? Because that wasn't the case in 5.1.

[martinnoweck]

thanks for all the responses.

best wishes,
martin

[Fredrik Harreschou]

Is that new in 5.2?

Yes. A great feature, BTW.

[Daniel Esperanssa]

...and goes along with RedColor2, RedGamma2, RedLogFilm, RMD support...

[martinnoweck]

found this post from Jim, which seconds what Hans said:


2. Set White Balance BEFORE converting to RGB space for grading.
Color science is based around White Balance. If you lock in a twisted (rotated) color matrix to RGB space for grading, there are no tools to un-twist the color. If you set 5600 and the real WB is 5000, you will only be off a little bit and probably not notice. But if you mistakenly set 3200 and the real WB you want to achieve is 7000, you will NEVER get there with any grading tool in RGB space. You will need to go back and re-white balance your R3D and try again. People who complain about RED's color usually find out that they have made this tactical error. The easiest thing to do is hit AWB in camera and/or shoot a white or grey card in the scene and hit it with the WB tool in REDCINE-X or other app that uses the SDK.

http://reduser.net/forum/showthread.php?t=40067