For some reason the Letter Box Type is missing in the Openpype Extract Review project settings. By default it renders Pillarbox. Was it removed by a reason? How can I specify different type for letterboxing?
Ok, answering my own question.
Yes, letterbox type is removed since the type is explicitly calculated from the image dimensions.
I was foolishly trying to letterbox the image with resolution 2048x802, which is 2.55 ratio, with letterbox settings 2.39. Obviously, it was pillarboxed instead, because image ratio is higher than the letterbox ratio.
This is the place where you can see how it is working right now.
P.S. For some reason the obvious thought about seeking the answer in the source code came to me late. Here’s the memo: don’t hesitate to seek the source of your confusion in the product’s code, most of the answers are already there.