How do you solve for lens distortion grid?


I cannot for the life of me find a good tutorial online to show me how to solve for a lens distortion grid, if i’m asking the right question. I’ve found a ton of Nuke tutorials, but nothing on how to achieve this in Natron. The LensDistortion node is not the same as Nukes.

This is what I’m trying to do in Natron…

I have already shot my grid using multiple lenses. I just want to create presets to un distort before compositing and then re distort after compositing.

PLEASE HELP! :slight_smile: