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!