Think of tags as like a book index where you find words and which pages they are on, the same principle applies here. Although it's taken a stage further so it might not be the word, but the subject, so for example if you're looking for things to do with fractal gradients for example. A tag may bring back posts with gradient files, as well as posts that discuss gradients, or tutorials about them.

glynnSim9

glynnSim

The glynnSim variations are a cross between linear and spherical. Using the unit circle as a dividing line, their output has three parts:

Outside the unit circle is whatever was there before (like linear),
Inside the unit circle is a reflection across the unit circle of what was outside the unit circle (like spherical), and
The points that were inside the unit circle are replaced with a blur:

linear16

linear

Although “linear” seems a strange name for a non-linear variation, it’s a really important one. The name makes sense in the context that it means not to use a non-linear variation, just the affine mappings that are part of every transform. When a new transform is created, it is assigned a variation of linear3D with an amount of 1, which just maps the input to the output without any change.