GREEN SCREEN ISSUE

[Lewis-M Soucy]

Hi,

anyone knows how to recover green screen shots? It looked good in the monitor on the shoot, but the dailies turn out to be very, well not green… I used what they called a "digital green screen" which is the super bright green fluffy textured thing in bright sun, really green! I thought wow! But either my Varo ND cut out too much green or I dunno. But my green screen areas are not very green and I'm afraid of keying now…

 

[David Battistella]

R3d snapshot?

david

 

[Jeff Kilgroe]

Yeah, post a snapshot.

Vari-ND's can be a problem, depending on how far you pushed the ND, you will get color casting and perhaps IR contamination as well. You may have to correct color before keying. Doesn't really matter which color the screen turns out to be, as long as it's evenly exposed and doesn't conflict with your subject material.

 

[Lewis-M Soucy]

 

[Lewis-M Soucy]

And that's the original green...

 

[Jake Wilganowski]

looks like you exposed to hot on the green screen. But theres plenty of info there, you could easily dial up the green saturation and bring down the level in RCX. I'd be more concerned with the spill your getting on youre actor. The screen looks like it was too close and too hot.

 

[Joel Arvidsson]

looks like you exposed to hot on the green screen. But theres plenty of info there, you could easily dial up the green saturation and bring down the level in RCX. I'd be more concerned with the spill your getting on youre actor. The screen looks like it was too close and too hot.

Did not see any r3d?


Looks like you better of with pulling a lumakey instead.

 

[Graeme Nattress]

The green is very bright. You could try generating a key from the very same shot, just with a much lower ISO. That should make the green appear vastly greener.

Graeme

 

[Bob Gundu]

As Greame said, If you can recover the proper levels, use that clip to generate the matte and then apply it to the brighter clip.

 

[Bob Gundu]

Also, looks like you could just do a luminance key anyway as its very backlit. Often times I use white instead of green if I know my foreground is darker. I don't have to deal with green spill either.

 

[David Battistella]

I think it's recoverable, but a couple of HMI's would have been your friend, or even some bounce.

unless you were doing a day for night thing.

David

 

[Thomas Koch]

Luma Key for sure. Otherwise, using a core matte technique with way iso reduced image, then use the alpha channel as the key to the normal footage.

 

[paulherrin]

did you record r3d's? even if not, all hope is not lost (assuming you know what you're doing, i.e. someone else). if you got r3d's looks like you'll be straight, just try to expose more evenly next time. the screen shouldn't be too far off in exposure from the actors skintones.

as graeme suggested, run it through a seperate, lower ISO (and maybe higher saturation) pass to pull the key then apply that to the original one with the look you want to get started with.

 

[Eric Haase]

next time use chroma green if it's in direct sun, digi if in shade.

 

[Lewis-M Soucy]

Thanks for all the great advice. Any idea what I should key with? I've checked around and there seems to be a few good tools but I have no idea which is best, especially in this context...

 

[Björn Benckert]

Upload a 5 second shot + background and we can all have a little key thread going. Or, how long is the whole scene? If not to long upload it all as r3d trims.

Working with different iso settings for the keygen layer and front layer would be the solution as long as the green screen is not completely burned. But the modular keyer / 3D keyer in flame would punch them right out. Make sure to key in full 16bit 5k to get the most detail and sharpen and downscale post key.

 

[Lewis-M Soucy]

Which of the 3 stills I posted earlier seems like the most tricky to key? I will upload a R3D trim of this one...

 

[Mark Toia]

You'll be fine Lewis, A luma key will save the day, I have received shots like this as well in my day, and we more than got away with it.
Flame / Smoke has the best keyer in the world... by far. Don't stress.

Björn is probably a far better Compositor than me, so give him some clips tp play with.

Even my one touch quick key in after effects works... with a crunchy little 8bit Jpg.. imagine how good a 5k Raw will be.

Handy tip for digital greens outside, Shade them from direct sunlight

 

[Ketch Rossi]

Lewis, you main problem there is that your Green screen is not evenly lit, no matter were, one must always try the best way to evenly illuminate the Green screen, other then that, which is for next time of course, al here have given good advices and options to fix it.

Best of luck!

 

[Lewis-M Soucy]

Mark you crack me up man :lol: I dunno why I'm not surprised by you being so on the ball... Wow!

I have my hands tied with my Cannes deadline for something else, but I'll be back with this in a few days... Thanks guys!

Oh and Flame is awesome of course, but way out of my league unfortunately... How about the other tools, like FX Factory PHYX Keyer or the Keying Suite at Red Giant...