Again, Cullen, fabulous job with this explanation. Thank you. The point about using the HDR tool for linear exposure adjustment helped me greatly. The other takeaway for me was your point about not chasing adjustments back and forth. Both tips helped me understand the source of some frustrations here at the very start of my journey to improve my color work.

Yea i definitely need to see more linear vs log videos I find it so fascinating and I would love to have an even better understanding on when and where to use both of them

Would you ever consider a series where you critique your audience's grades? That's something I personally feel would help me immensely. Perhaps in a grade school session?

Been waiting for this powerful option to be discussed! So helpful in for than a few circumstances. Thanks!

I was in need to this video! Now I really understook the linear vs log concepts and applications!

Great ! Thanks Cullen

I've been waiting for this topic. Please expand on this in the future.

You are amazing! Thank you so much for this!

Incredible information. Thank you for this knowledge.

first, thank you for reintroducing the grading dctl - I use it all the time. this is a subtly excellent explanation of something that has been puzzling me forever (log v linear). Many thanks.

You dropped this at the perfect time haha. I just finished the first pass of a grade where I was using HDR wheels for Balance adjustments instead of Primaries just because I thought it might give me a better rendition because of it being color space aware. Thank you for explaining in such great detail about this!

Cullen, please help me understand this video. You first said that more looky-feely adjustments are better done in a Log space and I get that. Next you said that Exposure and Balance adjustments are better done in a Linear space; however, your default node graph that we've always used has Exposure and Balance being adjusted in DaVinci Wide Gamut / Intermediate - a Log space. You went on to say that using the HDR wheels you can adjust exposure Linearly using photometric stops; however, photometric stops are exponential, not linear - but we perceive them as linear. Please explain how I've gotten this wrong. Thanks and thank you for being my mentor in all things color!

I was using linear gain instead of offset as you said is better in one of your videos from last year. Now I now why

Ive been waiting on this video for a long time thanks so much cullen if you ever get some time id love to see a video on look dev using Arri log3 with the mid grey dctl

Thanks a lot for your work 🙏

Thanks for your expertise, each time a great pleasure :))))

You're the best! Thank you!

Very helpful. I'd like to see a technical breakdown of where and how damage is done when using Slog-3 in 8-bit. Also a comparison between Slog2/Slog3/HLG/709/etc. Maybe trade-offs, use-cases, etc.

Nicely put together. I think we should be a bit careful with saying that log is for look developement. It’s really only the tools you use that determine the preferred color space/model. Any tool could be part of lookdev. And when the tool is color managed, the incoming data isn't even relevant, although in the case of Resolve this is slightly questionable... Regarding log vs linear exposure, it would’ve been cool to highlight the reason shadows ‘milk’, because of the black toe in the curve. Most colorists actually prefer this behavior (out of habit probably). But I’m not one of them :)

thank u sir♥

I think some of this is misleading... At around 8:45 you say you're getting a faster response from the offset in the shadows than in the midtones and highlights. In log that isn't really true for offset, the midtones are affected more than the shadows or highlights. Hence why printer lights are nice to use in log. You're comparing the offset (an add operation) to linear gain (a multiply operation). The effect of offset will add to the whole tonal range but actually less in the shadows when in log than when in straight unmanaged 709 for example. First time I've ever felt I disagree with anything you've said, your tutorials are superb and your eloquent delivery is always excellent! Thanks for the sharing the knowledge!

Would love to see an iphone footage related video, best luts/transforms for log shooting an espicially for regular hdr footage, i feel like many people struggle to get it right

I’ve been doing this wrong since…always. Great video! Thanks!

Hi Cullen Are you going to upload the panel discussion you hosted yesterday about exposure? I only managed to see half the event as i had family commitments. Thanks again for all the hard work.

Hey Cullen, can you please drop a download link for the DWG gray. Thank you

great

Thanks for the Video. What about the link to the Gray patch DCTL ?

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would you ever map the HDR wheels, to say clog3 for example, and adjust exposure prior to a DWG CST? I'm finding that this works pretty well when ETTR, setting basic exposure pre CST, with color adjustments in DWG/Davinici Intermediate, and then some final contrast/level adjustments after the final CST to rec 709.

Hey, since you're one of the leading grading experts that really seem to know what they're doing - how do you tackle the classic orange-teal look? The textbook way of doing this seems to be raising the reds and tone down the blues and greens on the high end, while basically doing the opposite on the low end spectrum of the curves. However, this of course desaturates a nice blue sky, giving it a dull, uninspiringly washed out look (in cases where the sky IS the brightest part of the overall image). Would be really interesting to hear your thoughts on this! Cheers ✌️

Would you rather manage sat in log or linear?

Thanks Cullen! One precision though, if you’re working in a wider color space (DWG for ex), to have a more accurate result you need to tag the gamma and the gamut of the camera, on the HDR palette. If not, Resolve will interpret the shot as a DWG colorspace, so the final result won’t be as realistic as it could be.

6:27 Burning question about the wheels. Is there a way to change sensibility of the wheels? You changed the image significantly yet the wheels look almost untouched. This finiky behavior drives me nuts when im grading, there is no fine tuning possible when 1mm movement of the dot is already a change like day and night.

So, I presume you don't have some kind of course people could purchase, because if yo did you strike me as someone wth the wherewithall to make a link to such a course easily discoverable. You're amazing, so I'm sad there is no such course.

Wheres the davinci grey image link?

By linear you mean YRGB like control response? Playing around with a gradient doesn't seem to verify what you're saying. Offset in da Vinci WG mostly affects midtones, it's like a gamma adjustment. When I set"linear" in-node, it's the same, just less pronounced. Offset is offset only in YRGB.

Where can I find the DWG grey patch at? Is it available for download?

can you tell me deference between public beta version and other.

Fascinating video, thanks Cullen . Please could you confirm my understanding on a couple of things. I think you are saying that Rec. 709 is a linear space, whereas DWG is a log space. In a DWG time line, Primaries - Color Wheels adjust in a log manner akin to the behaviour of the human eye - whereas the HDR Color Wheels adjust in a linear manner akin to a photometric adjustment such as exposure. Is that correct? There is a third set of wheels that you did not mention; the Primaries - Log Wheels. How do they behave in this context? Thanks.

What about the temp tool? Does it work in linear?

10:35 Does it mean Gain Wheel in Linear domain works exactly the same as HDR-Global Wheel in Log?

I never use the hdr wheels because i dont know for what. No i get an idea.

I've asked two or three times if you have a course,a nd I have yet to receive any kind of reaction.

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