Help with Understanding Gradient Band Interpolation and it's use in Camera Control

Is there anyone who is proficient enough to help me understand how I could implement the Gradient Band Interpolation Technique in 3D space. If you are looking for payment to guide me Through it I am willing to pay.

Here are some resources:
https://www.shadertoy.com/view/XlKXWR
http://runevision.com/thesis/rune_skovbo_johansen_thesis.pdf