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Canvas colour Request

Posted: Mon, 7th Apr 2008, 8:26am

Post 1 of 6

NightMan

Force: 1451 | Joined: 5th Sep 2007 | Posts: 40

CompositeLab Pro User EffectsLab Pro User FXhome Movie Maker

Gold Member

I do a lot of green/blue screen work and currently have Effects lab pro. It would be helpfull if the canvas could be rendered in green or blue if the quad is less than 100% so the remaining area could be used as green or blue screen.(Its currently rendered as black which possibly could be chroma keyed with composite lab - which I don't have yet) I haven't tried this in Composite lab trial version but this feature would still be useful in Effects lab.


[Moderator's note: moved to a more relevant forum and where someone will actually read this]
Posted: Mon, 7th Apr 2008, 9:42am

Post 2 of 6

NickF

Force: 2726 | Joined: 4th Jun 2004 | Posts: 933

EffectsLab Pro User MacOS User FXhome Movie Maker

Gold Member

You can change the canvas colour by clicking on the black box with a white border in the menu (below the menu bar)

From here you can then choose what ever colour you want.



Is that what you meant?
Posted: Mon, 7th Apr 2008, 9:55am

Post 3 of 6

NightMan

Force: 1451 | Joined: 5th Sep 2007 | Posts: 40

CompositeLab Pro User EffectsLab Pro User FXhome Movie Maker

Gold Member

I tried that initially but the concept is so one can see where the canvas is and any colour can be used but it will not render the canvas in the colour chosen. Chroma keying black canvas - I don't think will be successful.
Posted: Mon, 7th Apr 2008, 1:48pm

Post 4 of 6

FXhomer46784

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

EffectsLab Pro User Windows User

Gold Member

A chromakey might not be either successful though (if you have any blue, green or whatever in the image).

EffectsLab supports alpha channels though, so just retain the alpha channel when rendering and then key that out. You don't actually have to do anything this way, it's all 'built in' so to speak.
Posted: Mon, 7th Apr 2008, 3:11pm

Post 5 of 6

Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

VisionLab User VideoWrap User PhotoKey 5 Pro User MuzzlePlug User PowerPlug User PhotoKey 3 Plug-in User FXhome Movie Maker FXpreset Maker Windows User

FXhome Team Member

Yeah, just render out with an alpha channel. There's no point using enforced greenscreen/bluescreen stuff when dealing with computer generated images - just go straight to the source and retain the alpha (transparency) information.

Greenscreen/bluescreen is a technique that is only really needed when you're filming with live action cameras.

Unless I've misunderstood your first post, that is...
Posted: Mon, 7th Apr 2008, 9:37pm

Post 6 of 6

NightMan

Force: 1451 | Joined: 5th Sep 2007 | Posts: 40

CompositeLab Pro User EffectsLab Pro User FXhome Movie Maker

Gold Member

Thanks for the info - thats helpful. I haven't really done much using alpha channels so I am probably missing out on some stuff. I'll read up on alpha channels and start experimenting. Thanks guys.