Nuke Tutorial - Fixing Edge Contamination with Colour Smear

[@joojosart7772]

I literally painted out stuff like this for the last 4 hours to now find that tutorial which would have solved my problem in 1 hour -.- Anyway, great tutorial man!

[@santoshcomp]

It is really cool trick for fixing white edge. thank u so much for going so deep. Normally people do not go that much deep in tutorial. Again thank you so much from all of us who is working on nuke.

[@houstonmoco]

Great tute thx heaps - when you are doing the frame by frame feathering at 11:42 you cld use the ripple button in the roto toolset and it wld apply the same feather to all the keyed points. Only thing is to make sure you turn it off when yr done (or it will cause a ton of trouble)

[@NinjaPeony]

Found your tutorials during my final exams. perfect. THANK YOU SO MUCH !!

[@PDeNigris]

Great to hear!

[@ericprochnow7584]

Invaluable content ! Didn‘t kow about this gizmo , thank you so much !

[@thisthat....9120]

I do the same thing with different long technique. This one is useful and easy to play with. Thanks

[@George901210]

just finished some shots & this was a very similar approach about how I solve it, just a keyer with very high values can get away without rotoscoping, let's be clear that you need a floating-point image to bring back very dense detail edges like hair & stuff

[@PDeNigris]

Yes, and this solution isn't necessarily the best way to handle hair detail, it's most useful for high motion blur areas.

[@rendered_useless2093]

hello when ever I premult the colour smear all the extended pixels disappear please help. What I mean is also is that the smear mask is too thin in relation to the actual rgb smear pixels so whenever I premult the colour smear is much smaller than I need it to be. How do you ensure that the output smear mask is exactly the same and extends as far as the colour smear?

[@ronydey2696]

Sir please make a tuts upon vector blur edge blur and blur I. Nuke

[@Ajkokan]

Great tutorials sir Thank you so much 😊

[@MaheshMahi-zz8hc]

I can't see the download option

[@streamsandgalaxies]

Hello, I'm a beginner trying to composite a new background for my stop motion Tiff images that were created from a photo editor program (not photoshop). I created layers with parametric masks based on luminosity and key and luminosity combined but they are only RGB layers. I managed to send the red layer to the alpha channel in Nuke but in some cases the mask is slightly larger than the subject. Would I be able to use colour smear to shrink back the mask and add some motion blur? What other tool do you recommend if I want to refine existing mask layers? Or if the mask layer has some of the background bleeding through yet I want the whole area to be consistently masked?

[@VFXforfilm]

Awesome sir :)

[@MrThirumal]

thank you paul.

[@fivehundredandsixty-eight5656]

Thank you sir ❤️

[@Luckyj714]

Quick question: when I merge the roto back with the plate, my key is completely exposed again (showing the green screen). How do I get it so that the roto shows without voiding the key?

[@PDeNigris]

One, make sure you've got a premult after the roto, and two look at the alpha channel after the roto and make sure it's looking like you expect it to. If you're using a QuickTime movie it might have a fully white alpha and so your roto isn't doing anything. Shuffle the alpha to black before the roto and that should fix that.

[@amitkeshari2992]

Such a amazing tool thank you sir for the wonderful explain:)

[@pranav_pradeep]

You could save it as a toolset inside Nuke, so you dont have to copy and paste all the time.

[@PDeNigris]

True enough

[@oliverstar1175]

amazon tutorial as always ! thank you!

[@Annamalai30109]

Great tutorial, sir

[@TheJackzont]

Great tutorial. Thanks a lot

[@parthprajapati2108]

very great tutorial , thank you so much too shearing your experience ..

[@arieltafel4155]

great tutorial! perfect!

[@JoshuaBates01]

I'm new to Nuke and can't get Color Smear to show outside of my actor - I think perhaps I have the node in the wrong place? For reference, I'm following your other green screen tutorials and trying to get color smear to work after the fact. (The one where the guy is keyed on top of the scary looking house). What am I doing wrong? I see color smear is affecting things but it seems to be constrained to inside my actor, not outside.

[@PDeNigris]

Make sure you put the Colour Smear after the Copy node but before the Premult, and then make sure you've unchecked both the boxes related to Premultiplying on the Colour Smear node itself.

[@JoshuaBates01]

@@PDeNigris Thanks very much for your quick reply! I was able to get it working. I think I need to go back to basics to really wrap my head around Premults and etc. Love your tutorials, I'm basically learning Nuke from your channel

[@giorgiolucagno6444]

cool, I was just wondering what's the difference with the EdgeExtend tool? Thanks!

[@PDeNigris]

This tutorial was made before EdgeExtend. They are basically the same - but I like ColourSmear better.

[@giorgiolucagno6444]

@@PDeNigris I see. May I ask you what exactly you prefer about the ColorSmear? Thanks!

[@PDeNigris]

@@giorgiolucagno6444 I think it offers a bit more control in terms of the size of the edge extension, the falloff between original pixels and extended pixels, and where the actual extension of the edge begins. Also it might be because I'm used to ColourSmear.

[@giorgiolucagno6444]

@@PDeNigris Thanks for this!

[@ahmednasr93]

Ohhhhhhhh! this is why I was using after effects for this kind of work! missing the refine hard matte and refine soft matte in nuke.

[@ahmednasr93]

nu this gives more options to work with

[@PDeNigris]

Yeah those tools in AE are good... until they're not. I've had plenty of shots fall apart when trying to use the refine hard matte / refine soft matte effects. This method is more labor intensive but gets cleaner results more consistently.

[@skworld5464]

some people are saying that after this corona there Wii be so many jobs in vfx , so what's your opinion sir

[@PDeNigris]

It's entirely possible. I imagine we'll see more split screen comps where we put two actors in close proximity, and more crowd sim work.

[@Jaredvic]

what type of glove is that and what is it for?

[@PDeNigris]

It's a tablet glove, it's to keep my hand from sticking to my Wacom tablet. Absolute must-have if you use a tablet as much as I do!

[@apmanti12]

awesome! can you do a reconcile 3d tutorial?

[@PDeNigris]

You got it!

[@gowmmt7381]

Super. Cool techniq

[@WolverineMKD]

Amazing thanks keep it up!

[@WolverineMKD]

wrote this 8 months ago, found like 3 ways easier but still thanks for the tut!

[@mo7amedsamir919]

wat about gairl ??!!

[@PDeNigris]

Follow the same procedure.

[@VFXforfilm]

Hey sir, I’ve got 7300 VFX subscribers. Mind if I mention your KZbin site as a resource via KZbin?

[@PDeNigris]

Please do! Let me know if you want to collaborate on something some time. Thanks!

[@VFXforfilm]

Paul DeNigris I just posted on my KZbin site mentioning your channel, hopefully it brings over some traffic. Great stuff by the way.

[@PDeNigris]

@@VFXforfilm Thanks so much! I'll return the favor in an upcoming video!

[@VFXforfilm]

Paul DeNigris thanks sir :)

[@raviredrose26]

👌👌👌