Das Grain in Matchbox form?

Has anybody looked into replicating the Das Grain gizmo from Nuke? I feel like I’m going back to the middle ages every time I use the Regrain node.

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Is crok regrain any better for you? @ivar?

Not really. That’s a step up from regular regrain but DasGrain is basically witchcraft. It analyzes your plate and figures out how to realistically recreate grain in your comp, even if your comp ends up very different from your plate. It’s sort of like that trick where you minus your grain from your plate and then plus it back into your comp except it is able to do that without bringing in image artifacts that that technique usually introduces.

This is a very long example of how it works, if anybody really wants to know:

This Request is nothing new to me, but isn’t possible to do inside a single MX shader. I’m still fine with crok_regrain and crok_renoise, but i totally get that request, but sadly not possible. Or maybe i should say, i don’t know how to do it LOL! :slight_smile:

./ivar

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Thanks @ivar . Good to know. Well, not “good” - depressing to know might be more accurate. Maybe Autodesk can throw some ML at the problem.

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I’d vote for that. I posted a Flame Feedback Procedure.

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@greg give it a try. It’s fast and it works for Paul Round, who is doing feature film work.
Thats all i can do for now. Keep the feedback coming;)
./ivar

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The biggest thing for me is dealing with the different grain response in highs/mids/darks. I usually end up doing luma keys and combining different regrain nodes. If your Matchbox could do that all in one node, that would be fantastic.

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This is the closest exsiting Feature Request that I found on the Flame Feedback page. Let me know if the link works FI-01067

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link works. voted!

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I asked the folks at Neat Video about it after they did the Logik Live. I also requested the feature from Boris FX earlier this year when Boris came by the office to meet with clients. Fingers crossed!

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crok_renoise includes a Curve editor so you can adjust the amount in the low, mids highs via the curve

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i admit to harassing @ivar about this very same thing a few months ago. the ability to “scatter” the grain so any leftover artifacts from a removed item is a really great feature. great minds @greg !

Maybe i should give it another run and you guys tell me if its worth a shader. Will try replicate the functionality first via a batch setup. If that works for you, then it should be easy to merge it into a shader. If you have a simple setup already how you do it, send it over and i start from there.

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You’d imagine this wouldn’t be too tricky for Neat to implement since they already create the profile. What did they say about the request?

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i sort of hit a wall when trying to do my own scatter (what the voronoi function does in Das). i couldn’t randomize it enough in flame with just the off the shelf nodes and it also took a filtering / brightness hit

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I wrote 2 shader who can generated seamless patterns. Maybe i need to check the filtering setups

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@greg

I think I get good results setting the Flame Regrain node to custom and then sampling darks, midtones, and highlights in the original image or a similar image. And then tweaking the curves.

It sometimes takes a few tries but seems to work.

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ok… i did try yesterday to come up with a batch setup to replicate the Das Grain one, but sadly failed. If there is someone out there getting good results, plz send the setup over and i will merge it into a shader.

i prefer crok_renoise over crok_regrain and every shot i did with it, got approved. But i have to say, i’m not in the “difference key” business like maybe you are.

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