You are viewing an archive of the old fxhome.com forums. The community has since moved to hitfilm.com.

got a green screen, only small visual error [ANSWER]

Posted: Sat, 21st Jun 2008, 8:26pm

Post 1 of 9

Qbeck

Force: 1210 | Joined: 16th Apr 2007 | Posts: 117

VisionLab User Windows User MacOS User

Gold Member

I got some nice chroma green at a fabric store and hung it up, its great. The outcome was terrific, besides a light flickering near my outline. I'm not sure if this is a common error or not, so heres a picture of the original for you to work on. Obviously you won't get the flicker since the video isn't moving, but maybe you know how to fix it.

Posted: Sat, 21st Jun 2008, 10:13pm

Post 2 of 9

FXhomer46784

Force: 493 | Joined: 24th Dec 2007 | Posts: 329

EffectsLab Pro User Windows User

Gold Member

In that picture, your talent is too close to the screen from the looks of things. Standing too close will produce shadows on the greenscreen and a green reflection may be cast onto the edges of your talent (giving away the effect and making keying harder). Not sure if this is what is causing the problem you mentioned or not, but it's good to know anyway in order to avoid future problems, if nothing else.
Posted: Sun, 22nd Jun 2008, 1:43am

Post 3 of 9

Qbeck

Force: 1210 | Joined: 16th Apr 2007 | Posts: 117

VisionLab User Windows User MacOS User

Gold Member

worked, thanks
Posted: Tue, 24th Jun 2008, 1:53am

Post 4 of 9

Z films

Force: 316 | Joined: 27th Jan 2008 | Posts: 59

EffectsLab Pro User Windows User

Gold Member

Hmmm... I chroma-keyed it out and it worked fine heres the pic



Maybe you have to adjust your lighting, Oh well I dont know
Posted: Tue, 24th Jun 2008, 1:56am

Post 5 of 9

Travis Kunze

Force: 1077 | Joined: 11th Dec 2007 | Posts: 500

VisionLab User Windows User

Gold Member

There is still that green edge around the body, you might want to add a Spill Supression, that should pretty much remove the green edges.
Posted: Tue, 24th Jun 2008, 7:33am

Post 6 of 9

B3N

Force: 3081 | Joined: 26th Feb 2006 | Posts: 1534

VisionLab User VideoWrap User FXpreset Maker Windows User MacOS User

Gold Member

Right I've given this a shot, the compositing has left me with no problems, have you tried using the 'key grade' feature as this enhances the green color allowing you to take more away.

Anyway, I've added a grade filter which hides the green with it's spill suppression, bleach bypass and color gradients as well as color balance smile



If your curious to see what my timeline looked like,

It's just a case of messing around with the key grade and color difference tool as well as giving it some type of grade. wink

-B3N
Posted: Tue, 24th Jun 2008, 6:52pm

Post 7 of 9

Qbeck

Force: 1210 | Joined: 16th Apr 2007 | Posts: 117

VisionLab User Windows User MacOS User

Gold Member

Actually, I'm pretty good now. I did a test shot standing farther away and got perfect results. I was going to start another topic for help on grading, but since were still pretty active i'll just ask here. This is for grading AFTER the shot, not key grading. The problem is I really can't seem to get a good type a color gradient going over my shot (I can't post a picture of absence). What exactly does bleach bypass do?
Posted: Tue, 24th Jun 2008, 7:03pm

Post 8 of 9

B3N

Force: 3081 | Joined: 26th Feb 2006 | Posts: 1534

VisionLab User VideoWrap User FXpreset Maker Windows User MacOS User

Gold Member

Bleach Bypass is a Visionlab only filter, it basically gives it a more polished and highly contrasted look.

As for grading you'll need to mess around with either Contrast Pro, Brightness, Contrast, Levels, etc for getting a nice lighting set up. Then Ambient Color is for enriching the image with a color but will need to have the color balance filter above it to enable you to keep the images origional color therefore only leaving a tinted color ambience.

I'll probably explain it in more deatail as I'm busy right now but good luck wink
Posted: Sun, 29th Jun 2008, 8:33pm

Post 9 of 9

Z films

Force: 316 | Joined: 27th Jan 2008 | Posts: 59

EffectsLab Pro User Windows User

Gold Member

Travis Kunze wrote:

There is still that green edge around the body, you might want to add a Spill Supression, that should pretty much remove the green edges.
Yeah I know, I was just posting it to show that the lighting worked fine, Thanks for telling me about spill supression