Shifting colors from the timeline to Fusion + Mocha Pro

So I decided to repost something I posted on the general forum for Resolve (https://forum.blackmagicdesign.com/viewtopic.php?f=21&t=128174). I don't know if it's some kind of "user error/not knowing what I'm doing " or if it's something that should be adressed because it's the same kind of problem as the scaling issue (for example) on windows.

I put a response to Jim from the other post at the end of this one.

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It looks like the Davinci Wide Gamut preset can be used with SDR content too, and gives more granularity for color grading :

(video from Darren Mostyn).

I tested it and color graded some SDR clips with Davinci Wide Gamut, still pic, and I really prefer the final result and the way the color wheels acts even on SDR content.

Anyway, here's the problem for me, before the color tab, there is the Fusion tab I often use. And coming from the timeline, the colors are off in the viewers if I'm on the "Davinci Wide Gamut". I'm lost with the "correct" workflow to use to get the same colors as the timeline,... AND with the Mocha Pro plugin too (screenshot).

I found many videos and articles about how to set up a linear workflow for Fusion (ACES too) standalone (it really seems to be easier with this one) and Fusion with Davinci Resolve :

).

But I don't know if it's the right way to do it for my case, and I never really implemented it because I always had some problems elsewhere.

There is nothing about this now Davinci Wide Gamut out there yet.

Is anyone can help me or point me in the right direction? An article on the subject? How to set up Fusion the right way to get the same colors as the timeline? For the Mocha Pro part, I guess I'll have to do some color space transform of some sort before linking the mediaIn to the Mocha node.

It's hard to explain because I'm a noob about all of these "color space transformation, lut viewer, etc". Of course, I could stick on Davinci YRGB and Rec.709, but it's not really interesting.

Thanks

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There's actually a new forum for version 17 issues.

viewforum.php?f=36

Yeah I know, but it's not really specific to the v17 (I had the same kind problem with trying to figure out a workflow with ACES, and SDR content in Resolve with 16).

I didn't post on the beta forum because I'm not familiar enough with these kinds of things, and I don't know if it's me doing something wrong/not knowing how to have a proper workflow for what I'm trying to accomplish, or if it's a problem never addressed by BMD (like the scaling issue on windows).

But maybe I'm wrong and I should post there, because for me, the logic tells me that the colors should stay the same when we go from the timeline, to Fusion, to the color page, then to the rendering page.

Actually (for what I saw, maybe I'm wrong), with Fusion in Resolve 16 or 17 and with anything other than sRGB or rec.709 (those two show the same colors in the viewers, on every page, same from mocha pro coming from the fusion page), it looks like we have to put X colorspacetransformwhatever nodes after the MediaIn, change things in the viewers, blalbal, then reverse all of it before linking the composition to the MediaOut node to get something looking normal on the timeline.

I think it should be the opposite, nobody should have to change anything in the Fusion page to get the same colors as the Edit/Timeline, but if someone needs to work in a linear space/whatever, they should have to put these additional nodes.

I have a similar issue that I can't find the correct way to resolve. There is a colour shift between the Fusion screen and the Edit screen. I'm working with chromakey footage that I'm colour correcting within Fusion. It makes it extremely hard to match shots when the corrections I apply in Fusion look different when I switch to the edit screen.

What am I doing wrong?