Filming a VFX Lens Distortion Grid

Hi all, don’t miss this VFX resource by Hugo’s desk. In this video tutorial you’ll see how to film the Lens Distortion Grids, how to use in Nuke, and why the Lens Distortion is important for the success of good visual effect.

Lens Grid Download Model

Timestamps below. On this video, we talk about why we should film Lens Distortion Grids in VFX.


00:00 Introduction
00:32 Why should you use a Lend Grid?
00:49 Two types of Distortions
01:26 Why can’t I draw lines to calculated Distortion?
01:52 Important reading
01:57 Necessary equipment
02:25 Eric Alba’s website
02:40 How to film a Grid
04:00 Special notes about f-stops
05:08 Undistorition pipeline in NukeX
07:27 Conclusion
07:46 Producer Level Patreon Credits
07:50 Patreon Credits

Important reading:

What is Distortion by Wikipedia

On-Set Visual Effects Documentation by Niles Heckman

  • These grids are 48 inches by 96 inches PDF files for you to download. You or your Art department can have these printed, laminated (matte finish if possible) and mounted on a wail or board. You can scale these if you want a bit of a margin for rigging/mounting.

Lens Grid information by Eric Alba

Distortion article by Edmund Optics

  • Distortion is a nonlinear geometrical aberration in which magnification changes with field height. Learn about three common distortion types in imaging applications: pincushion, barrel, and keystone. Join Gregory Hollows, Director of Machine Vision Solutions, as he discusses distortion and provides informative tips to correct for the different types. You can also learn more about distortion in our Comparison of Optical Aberrations application note

EO Imaging Lab 2.1: Distortion video by Edmund Optics

Estimating Lens Distortion Using a Grid


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