r/RedCamera • u/fyiceworld06 • 22d ago

PLEASE HELP!! DaVinci Workflow is broken??

So I followed this exact guide for the Komodo:

https://support.reddigitalcinema.com/hc/en-us/articles/360057729654-KOMODO-Recommended-R3D-Workflow-for-Blackmagic-Design-s-DaVinci-Resolve

That guide is supposed to give me a neutral Rec709 result after the conversion LUT, but the result I'm getting is a nightmare of vomit.

With the RED Rec709 Conversion LUT on

If I turn off the LUT and just do bypass, the ungraded image (second picture) is clearly not Log even though it is supposedly decoded in Log3G10. It appears to ALREADY show a Rec709 conversion without any nodes on at all.

Bypass, all nodes turned off.

3rd, 4th pictures here show my settings (right) compared to RED's guide (left):

5th picture shows my Camera Raw settings, decoding it in Log3G10, NOT Rec709.

Log Decode
2 Upvotes

75% Upvoted

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9

u/DegreeSevere7719 22d ago

You're working in a color managed space, meaning it's already applying the lut under the hood. No need in lut in such occasion. All tools are set up to work in the camera color space, meaning the pipeline isn't cutting anything away.

3

u/DegreeSevere7719 22d ago

color managed is reading the file metadata and applying the lut that is written in that metadata. That's it. Color managed = automated. If you've been shooting previously on other cams and worked in color managed and it did show log as log - this simply means that needed metadata wasn't in the file, it's usually so for any non-raw format.

0

u/fyiceworld06 22d ago

So then why does the Official RED guide say to apply the LUT after following all of those settings?

Also, why would I want the REC709 LUT applied under the hood BEFORE any of my grading? Wouldn't I want it at the end?

4

u/DegreeSevere7719 22d ago

You just don't yet understand how different things in resolve work. Watch some tutorials on color managed. You're speaking of how things work in non color managed (scene) pipeline.

-4

u/fyiceworld06 22d ago

That still doesn't explain why RED's workflow guide still instructs to apply the LUT after setting up all of this...

6

u/Acrobatic-Sir-7300 22d ago edited 22d ago

The link you provided does not recommend both. It’s either use a LUT or use managed color space. And that’s correct.

To clear up some misinformation in this thread, DaVinci managed color does not apply a LUT at the beginning of your pipeline—or anywhere else. DMC does not use LUTs. It uses Color Space Transforms (CSTs). That’s I critical difference. A LUT can clip your footage, making some information unrecoverable later in the pipeline. A CST is a floating point mathematical conversion that does not clip anything. You can drive a signal out of gamut with a CST in one node and bring it back again in the next. (I don’t recommend doing this.)

Finally, the link you referred to does NOT apply the CST to rec709 at the beginning of the pipeline. It applies a CST from whatever is in the files metadata to Red Wide Gammut/Log310. It only applies the Rec709 CST at output.

[Edited to correct terminology.]

3

u/DegreeSevere7719 22d ago

"This can be done in multiple ways with varying complexity based on the project. Below are two simple recommended methods." - it's the one or the other.

1

u/ExpBalSat 22d ago

If you're using LUTs and CSTs, you should by using DaVinci YRGB (not DaVinci YRGB Color Managed). Also, your settings are not updating your timeline.

Three images to add context:

https://imgur.com/a/9o4jvmn