I put out a new tutorial today, all about lens distortion in Nuke. There are lot of tutorials about how to use the Lens Distortion node out on the internet already, but this one (I hope) is a bit different. The main focus is not how to take out or add in distortion, but more of a look at the overall workflow. When do you apply distortion, how do you add it back in and how would you apply this to your renders are some of the questions I try to answer.
You can check it out here.