Greenscreen, Bluescreen question and problem...

[Want2b3D]

Hi guys, its been awhile, how have all you lot been?

Recently I have ordered a Green Morphsuit for a project of mine which I have been testing quite a abit with it, however it seems I cannot get it quite right, I get it close but just right in a way. My problme is that when trying to key out the morphsuit I am able to get a good key as I filmed it in broad daylight and at a high shutter speed to reduce the amount of motion blur (I intend on adding it back later on), but I get a very strange dark rim around the edges of the body which I cannot get rid off.

I used After Effects and Keylight to do the chromakeying and have been messing with the results almost inside out, I am able to clip the blacks and whites pretty well but never the edges, the closest was increasing the Screen Balance, but this gave me unpleasant results everywhere else as it started even key out colours that it should thus giving them a different colour outlook, so usually I turned it down to '0'.

I choose green because of its brighter luminance and thus I thought ti would work out better, however I am starting to complement Blue because I assume it would work better on the darker areas and could give me a cleaner key, but this is just talking assumingly at 3am

I was wondering if anyone here with experience can help me out with this? Would greatly appreciate it, especially with the tight deadline I have on

P.S. I have attached for you wonderful lot a before and after screengrabs of my results to illustrate what I'm talking about, this example also is the best result I can get after quite a abit of tweaking.

[Vladimir Zharov]

Didn't matte choker help a bit? Or Shrink/Grow in Keylight to get rid of the edges?

[Roary]

Might be worth pulling 2 keys? For the core and edges, at least that way you have control over by individually.

[Want2b3D]

Didn't matte choker help a bit? Or Shrink/Grow in Keylight to get rid of the edges?

I did indeed try adjusting with the Shrink/Grow in Keylight, however when shrinking it the dark edges would remain intact but thickening as I go along and growing it would cut into the clothing which isnt ideal, also the outline of the edge would still remain but much thinner.

About the Matte Choker, I'm not too sure how to use that with Keylight, because wouldnt you use it along directly with Mattes itself?

Might be worth pulling 2 keys? For the core and edges, at least that way you have control over by individually.

That would be worth trying, but because its a dark neutural colour I worry it would 'key out' a lot of other objects which is something I definately do not want happening.

Also question for all, would a Blue coloured morphsuit be more ideal or would help me in this kind of problem?

[radders]

You'll always struggle to key this kind of stuff completely. Often, in the time you spend trying to key it you could have just roto'd it anyway.

[Want2b3D]

...Ohhhh, incase this migt help anyone, I am recording the footage with a Panasonic Lumix GH2, I did it both in 24p and 50i in H.264 which still gives me the same results either way. Using a 25mm at F1.4 and exposing it correctly as much as possible but still cranking it up jusstt a little bit to let more light in for the darker areas.

You'll always struggle to key this kind of stuff completely. Often, in the time you spend trying to key it you could have just roto'd it anyway.

Well what I've also noticed (and hopefully you have too) is how the footage of the cleanplate looks brighter than the footage containing the actor, I think this is due to its automatic spill supression, after enabling and disenabling Keylight I can see it's affecting thge area around him. If I am correct in this matter, is there anyway to turn off this built-in spill supression?

[radders]

I usually use the keying nodes to create a separate matte and then copy that matte back to the original RGB stream, that way I can ignore anything that the keyers do to the colour and I can do my own despill.

[Want2b3D]

Can you elaborate your mentioning of keying nodes to create separate mattes?

Also for the meantime, why is this happening with me in AE? Even just not too long ago have somewhat removed them via Shrink/Grow and checking Unpremultiply Result, they still cut into the clothing and small details have been removed. I have been switching back and forth of the original footage keyed and without to see what is this dark rim exactly, but it just seems to appear.

[radders]

Do pull the key separately in After Effects you can duplicate your footage layer. pull the key on the top layer, then use that layer as a track matte for the original layer below.

I don't understand your other question.

[Want2b3D]

I see, would you say pull a key using Keylight but selecting the output as a Screen Matte only? anf work from that?

My second question was really, why is this happening with me in After Effects? meaning, why am I getting this dark edge outline after getting a clean keying?

After that, I mentioned what I've done "...just not too long ago have somewhat removed them via Shrink/Grow and checking Unpremultiply Result, they still cut into the clothing and small details have been removed. I have been switching back and forth of the original footage keyed and without to see what is this dark rim exactly, but it just seems to appear."

[drknkook]

First guess would be a premult issue, but I don't know anything about comping in After Effects.

But as radders mentioned, I would also pull multiple keys, shuffle out just the alpha, and copy the alpha back into the src rgb. From there I would do edge fixes if I need to (such as unpremulting, expanding, then premulting the edge back).

[Want2b3D]

I see, well as I said in my previous post, I checked on the Unpremultiply Result box and it improved results abit but spill supression still remains and so does the dark edges. After initial research, this could actually be a 'halo' effect?

I'm not a expert in After Effects, but about pulling multiple keys, I assume your method you're talking about, taking the original footage and creating a matte out of it, do the neccessary adjustments to it directly and use the result of that to do the keying? All of this done through multiple layers?

In other news, I've once again was playing around, and as I mentioned before Ive adjusted the Shrink/Grow and just about got rid of the adrk edge, however it did cut into the clothing, you can see this in my attachments here.

However, something interesting came up, I added Key Correct's Edge Finder, and it strangely highlighted the prolematic dark edges in my resulting footage as you can see here in my other image attachment. I was wondering if there anything I could do after this?

[Want2b3D]

Also I would like to ask, because I will be filming around an area where there would most likely contain quite alot of green surroundings (i.e. grass, bushes, trees) would using a green morphsuit still work in such area or would I seriously encounter problems when coming to the keying process? Or would the luminance of the green morphsuit be able to distinguish itself from the other green in the shots?

[radders]

Also I would like to ask, because I will be filming around an area where there would most likely contain quite alot of green surroundings (i.e. grass, bushes, trees) would using a green morphsuit still work in such area or would I seriously encounter problems when coming to the keying process? Or would the luminance of the green morphsuit be able to distinguish itself from the other green in the shots?

I would switch to blue.