This week i had the pleasure of working with an artist that had a very good understanding of the the paint node RotoPaint in Nuke.

The gear in the upper left corner of the viewer has many options that have great appeal.

Round check box: Paint from the nearest whole pixel.
Shuffle a white alpha before your paint node: This fixes many problems that crop up with use of the onion skin feature.

Things that are still missing.

"over" is the only transfer mode you can use, for onion skinning. I'd love to have a over and one layer inverted. This makes it easier to align plates for painting.

Progress, Yes!

Thanks for the lessons Josh.