Extracting layers from Paint.NET
Paint.NET doesn't seem to be able to do this natively. Take a look at the utilities on this page:
http://www.comsquare.ch/index.php?option=com_content&task=view&id=36&Itemid=55
Specifically, pdn2png
can save each layer into a separate file with the /split
option, like so:
pdn2png /split yourfile.pdn
Alternatively, for something with a graphical interface, try this:
http://forums.getpaint.net/index.php?showtopic=9704
I did a quick test with a 2-layer PDN file, and both seem to work as advertised.