Removing the background color without chroma key (Luma matte/alpha)

mask
alpha-channels
masking
(Max) #1

Hi!

I installed Natron yesterday. I have a sample https://www.youtube.com/watch?v=YMRyrd95je0 (http://mediafire.com/?ej5tfivmlmm6ij3).

How to remove a green color using luma matte (without a chroma key) and add another background (image).

I tried https://youtu.be/ompQOAeuFR0?t=126 but it does not help, my video and background are transparency…

Any tips? Tutorials?

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(Chris Tempel) #2

If the B&W image is just an RGB (no alpha), merge your “Jet” over the Sky and run your BW matte into the “Mask” input on the merge. Set the mask to the red channel and it should work.

Also, see my video here for help with transparency https://www.youtube.com/watch?v=bsRlZvB2kkg

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(Chris Tempel) #3

I painted a happy face as my matte and used that to cut out the color bars from my checkerboard. Hope that helps
52%20PM

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(Max) #4

Thanks. I’ll try.

PS. Can you send me a “happy face” project?

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(Max) #5

I did it bro. Thanks.

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