I’m in the process of getting more advanced with nuke and would like to ask a couple of questions that may get you thinking even if you’re really used to working with nuke.
I’d like to hear anyone’s answer,
I know that when you work in nuke it’s necessary to sometimes premultiply/unpremultipy.
I know that this is necessary when you need to use the over operator.
I also know that it’s recommended to unpremultiply/premultiply for color correcting.
correct me if I’m wrong
While using the channel nodes such as shuffle-copy, channel merge, do these premultiply the image or should you do a premultiply before/after merging channels or shuffling them around from different sources?
For example, you get the r,g and b channels from different sources and then copy in the alpha from another source.
Would the alpha be premultiplied at this point with the r,g, b if you had done a premult furthur up in the stream or should you do it after the merge or shuffle?
Post a Comment