If I try and shuffle any of the channels, they all come out black. But you can view them fine in the 'layer' selector in Natrons viewer.
Is this a bug, or am I missing something?
COngratulations, you've found a bug!
That's not really a bug, though. I think you are using input B to connect to your Read node? In 2.3.6, input A should be connected. This will be fixed in the next release.
It's black for both a and b on my end. Can you post and example of out working?
Ah! That's how it works. I was selecting it via the Output Plane:
Output Plane parameter is to put the output of Shuffle in another plane than the standard Color Plane. Will be more clear in the next version (I hope)
It might be worth consolidating the terminology used as well. I might be mis-reading it, but it seems that the words plane,layer and channel used interchangeably in Natron. My preference would be to stick with Channel.