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Background colour visible in Alpha Channel on edges.
Hi,
I need to output a clip with an embedded matte for delivery to a tv channel.
I’m finding as in the past that After Effects rings all mattes with the colour of the Background.
Normally this isnt too much of a problem however the current clip only has three colours magenta/black/white.
A magenta blackground will ring the black edge with magenta -and- the black background will ring the magenta with black.
I’ve tried exporting a luma matte and using it to mask two different coloured solids but after effects defaults to the background colour regardless.
Anyone have any suggestions?
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3 Replies
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Did you render (use the render queue) with straight alpha? Most apps prefer that.
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as opposed to premultiplied? no. i’ll try that thank you. i suspect that may do the job.
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Always use straight mattes where you can. Premultiplied mattes will always include a small amount of the background color in the semi-transparent areas.
Erik
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