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Rendering comped vfx shots with matte in alpha channel
I need to deliver ProRes 4444 Quicktimes of final vfx shots with a matte in the alpha channel so that foreground and background elements can later be color-corrected independently of each other. The post facility requested that the alpha be set to ‘none’ instead of ‘straight’.
In the past I’ve delivered shots as DPX or EXR image sequences, and mattes as separate image sequences, this is my first time trying to combine them into one ProRes Quicktime delivery and aaaargh I can’t figure it out!
Any help anyone can offer would be very appreciated, thank you!!Rendering comped vfx shots with matte in alpha channel
I need to deliver ProRes 4444 Quicktimes of final vfx shots with a matte in the alpha channel so that foreground and background elements can later be color-corrected independently of each other. The post facility requested that the alpha be set to ‘none’ instead of ‘straight’.
In the past I’ve delivered shots as DPX or EXR image sequences, and mattes as separate image sequences, this is my first time trying to combine them into one ProRes Quicktime delivery and aaaargh I can’t figure it out!
Any help anyone can offer would be very appreciated, thank you!!
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2 Replies
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You could send a luma matte along with your “none” alpha Quicktime 4444 all in the same file.
See attached.
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In my case I’m delivering a comped shot with fg/bg and don’t want the bg to be transparent for any reason, just want to store the color-correction matte in the alpha channel.
Figured it out tho, I had to render ProRes 4444 XQ and not ProRes 4444. Now when I import the XQ render and Ignore Alpha, I can see the bg plate when viewing “Straight Unmatted” in the channel viewer, whereas with regular ProRes 4444 the bg wasn’t showing up, which is where I was getting hung up.
Thanks for the help and for sending the video!
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