A handy tool for those who want to isolate or combine multi matte and ID passes channels quickly. Has also been updated with the feature to select the desired merge operation.
RGBAMerge
Updated: 28 October 2015
Author: SuperU
Compatible Nuke versions: 7.0 or later
Compatibility: Linux, Mac, Windows
This tool is intended for use with RGB multimatte and material ID passes, it lets you quickly select, isolate and combine RGB channels into an alpha matte all in one node.
Has also been updated with the feature to select the desired merge operation.
Simply tick which colours you want to use for your alpha matte and the job is done!
I personally use this tool all the time when grading CG elements.
Please let me know if you found this node usefull I would love any feedback comment, this is my first tool I have published so please be gentle!