DogPass

DogPass

Difference of Gaussian Filter pass.
Usable for edge detection.

A lower sigma will create thinner edgelines, tune to get the sweetspot.
Maximum sigma is 2.5.

http://en.wikipedia.org/wiki/Difference_of_Gaussians
http://www.tara.tcd.ie/bitstream/2262/12840/1/eg07.pdf , Adaptive Abstraction of 3D Scenes in Real-Time by Redmond and Dingliana, 2007

Constructor

new DogPass()