One thing I’ve discovered recently is the Master Keyer’s auto CC feature works better (or maybe easier, which is still better) if you feed it a fully saturated color, vs whatever green or blue you actually keyed, and once you have the chroma CC’d away, you can do all the fun mathy keys from that one youtube tutorial in Nuke:
In my experience the Master keyer works just as well in Aces as it does in Rec/Log. The IBK works better in Aces, and a good clean screen is essential for it to work ‘really’ well. The IBK has excellent spill suppression for really really tricky motion blue/hair etc.
Good video. Actually a good channel for me to geek out on.
Yup from 26:00 he talks about this IBK technique. Balancing out the green screen etc. Excellent.
Ha @justinbromley I still have a little bit of this footage. I use it for all my green screen testing.
@PlaceYourBetts Yeah I remember that one. We used the Sapphire “math comp” or something like that for the hair detail? We are rocking a modified version of your ‘create clean screen’ set up still.
I’ve tried to match your comp @PlaceYourBetts and watched Mihrans video. I just can’t get it to work properley at all. I don’t know what I’m doing wrong. At the end the BG just won’t come through properley and the edges look very bright if I CC the BG.
I can’t seem to get a good clean green behind my subject before the final key
Let’s be clear. I doubt there’s a single person on this form that doesn’t feel like an impostor. A so called charlatan. I feel the same way. But when I recall over the years all amazing artists I’ve come to know, I’ve never not learned something from each of them. And with budgets going where they are going, and schedules doing their insane shrinkage, at the end of the day all we have is each other. All we have to keep from sleeping under our desks when that ridiculous request comes in at 18:00 is each other.
It happened me yesterday.
Yesterday me, tomorrow you.
I might be misunderstanding you when you say “clean green” but just so it’s really clear - the clean plate is not supposed to be a solid color green, it’s supposed to look like your set’s green background if the actors weren’t there. IBK is basically doing a difference between the clean plate input and the main plate input, so if your main plate’s green has wrinkles and shadows on it, your clean plate should as well. The best way to do this is to stabilize your main plate and then go through and reveal in the bits of the green bg that show up when the talent moves. Then, invert that stab so that painted frame matches the greenscreen in your plate as close as possible.
I’m also not sure why you would be doing a CC to the plate before you IBK it. That could make sense for other kinds of keyers but not IBK. IBK is doing a color matching of the plate to the BG so if you’re feeding it something that isn’t the right color for your final comp, then it’s going to look weird.
If you want to post some examples of what’s going wrong on here, I’d be happy to give you some more specific pointers.
@greg Do you use the IBK matchbox?
My comment was more towards Mihrans video he did a while ago. Placebets seems to use a similar method.
I’ve got a simple GS that I’ve been using in Nuke and can get really good hair details. I would love to be able to get the same result in flame but can’t quite get it there.
Ah, I see my misunderstanding - yeah, it’s totally normal to try to cleanup and CC a greenscreen for other keying methods. If you’re having trouble getting the hair detail in the Flame IBK, a couple other methods that I lean on are the additive keyer, which is similar to IBK but best if you’re comping dark elements against a bright BG. Also the Matt Curves node in Batch is good at refining a fine edge - it’s like the Addmix node in Nuke, if you ever use that.
Yeah I have tried so many methods bit can never get a satisfactory result. I have a load of blue screen to do later this month and are trying to get something that will work.
I have just delivered a massive project so I have a little time on my hands. Let me see if I can’t come up with a very simple breakdown.
Where can I get my hands on some royalty free footage? Blue or Green screen. Ideally some stuff that has Dutch seams or badly lit change in colour.
I think there are a couple of short films that share their assets but i cant remember the names! One is the science lab shots that are commonly used in tutorials.
EDIT: @PlaceYourBetts
https://mango.blender.org/production/4-tb-original-4k-footage-available-as-cc-by/
Nice!
Now how does one download them effectively?
EDIT : using this and it’s decent
This seems like a good candidate:
https://media.xiph.org/tearsofsteel/tearsofsteel-footage-exr/02_3d/linear_hd/
Can’t tell 100% but I’d say that looks right. IBK is best for transparent and fine detail so you would comp that in over a more traditional key
IBK is fine for blue but the blue channel usually has the most video noise, so you should definitely be working on a denoised plate, if you’re not already.
Thanks mate! Its more to do with the keyer making those big holes where there isn’t anyblue. It look was just a very rough look 
I’m guessing you’re talking about the window frame toward the top of the image. Maybe there’s a lot of spill on them? I would do another kind of key for that area and use that section of the IBK for the edges - or just don’t use the IBK in that area.
