What Texture Generators are
Texture Generators create patterns, shapes, noises and grunges from scratch, requiring no inputs.
These are usually grayscale but can be color.
Texture generators are used in Substance 3D Painter and Substance 3D Designer.
They are authored in Designer.
There are different categories of Texture Generators:
Creating a thumbnail
Find how to create a thumbnail for you mesh based generator on this page.