cheapLensKernel v1.1


 
This location is for Registered Users Only.
Perhaps you need to login or register.
Contributor: Mitchell Kehn
Replicates the effect of Bob Roesler's Lens Kernel FFT gizmo, but cheaply.
Requirements:
11.0, 10.5, 10.0, 9.0, 8.0 or later
Linux, Mac, Windows
08 Aug 2019
256

lensKernelCheap replicates the effect of Bob Roesler's LensKernelFFT gizmo, but cheaply. The FFT version is a good way to add some realistic lens abberations, but it's pretty heavy for what is mostly just a softening filter.

This cheap version replicates that softening by mixing a bunch of blurs together with channel offsets, which were manually adjusted and balanced to match the kernels provided with the FFT version. The only time I've really noticed significant differences between them is on high values that would start to reveal glints in the HDR image kernel.

According to Nuke's performance profiling, lensKernelCheap was about 10 times faster than LensKernelFFT on a 3840x2400 test image, far faster to work with. It has the option to switch to the FFT version, and also to force the FFT version when rendering from a non-GUI Nuke.

You'll need to add the filepaths to the .EXR kernel files onto the read nodes inside the internal FFT node. The files are accessible through google in several places, such as this github folder.


 

Sample images:

splitscreen

f14
f28
f56

 


 

Version history:

1.1 - better wrapper controls for internal FFT version
1.0 - initial upload

Please login in order to download these files.

You have no rights to post comments

We have 3052 guests and 86 members online