Well, i am a prep artist at my vfx studio, There is one thing that i struggle a lot during my work is Lens distortion.I do lots of projection stuff everyday, and usually end up doing a grid warp over my projected patch.Well i searched a lot and got a solution that i should take out the lens distortion of a shot before projection it.I have few doubts regarding the workflow and trust me i searched the whole forum for this.thats why troubling you guys.
1.Have heard people using the overscan thing.i know its a percentage by which the footage is extended as delensing stretches the edges.But how to calculate that.ex.if i know the footage was extended 20% by the matchmove dept, then how i calculate the overscan format.?
2.What is the correct workflow. if i have a dmp of a certain frame. should i just undistort it first and then comp it over the plate or undistort the whole plate ,render ,and then comp my undistorted projection patches.?
If you can show this with a example script it will be a great help
Thanks a lot.