Hi all,

I'm starting out on a new animation using oil paint on glass with the cel-erasure technique. I'm animating a serpent with rainbow colours and wondering if anyone has any experience with multicoloured stopmotion and green/red/yellow screening. I'm thinking I'll need to limit my colour palette and cancel out green. Otherwise I'm looking at a few After Effects effects trhat I can apply in post for a shifting rainbow effect (on top of a single coloured animated character) but Id really prefer to keep it hand made looking as much as possible. (A big influence is 'The man who planted trees').

Thanks in advance,

Bernie

https://vimeo.com/195135473

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Are you shooting it against a green screen, and then keying it out? Is that why you are thinking of limiting the colour palette?

You could shoot against a black screen and do a Luma Key, or alternatively pull a track matte from your green screen key and scrub out anything where you want the green still to appear. Then lay the track matte over the original shot (with all its greens).

Thanks so much Simon, yes I was going to green screen it, but then decided to paint it directly over the ink background which will sit under the glass I'm painting onto with oil paint (although this cuts down my options for creating motion for the background itself).  I was testing over black screen too but didn't know about Luma key - will find some After Effects tutorials on this but any tips are greatly appreciated.

Simon Tytherleigh said:

Are you shooting it against a green screen, and then keying it out? Is that why you are thinking of limiting the colour palette?

You could shoot against a black screen and do a Luma Key, or alternatively pull a track matte from your green screen key and scrub out anything where you want the green still to appear. Then lay the track matte over the original shot (with all its greens).

Hi Bernie

Although people talk about green screening, it is not essential to use green. I often use blue, as it is close to the colour of the sky anyway. Really all you do is choose a colour that is as far away from the colours of your image as possible. Then if you are using Keylight in AE, just use the pipette for sampling the colour to select that background.

Luma key will just take out the blacks. Sometimes it can work better if Keylight is being a pain!

Thanks, yes I always use keylight and different coloured key screens, that's not the problem. Ive tested the luma screen option and it kind of works but ill just need to lighten all my rainbow colours significantly.

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