Update: HairTG-Feather is the new name of this tool, formerly known as HairTG – Surface, Feather Edition.
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HairTG – Surface, Feather Edition has been nominated for the Substance Designer Insanity Awards 2020! https://magazine.substance3d.com/substance-designer-insanity-awards-2020-revealed/
HairTG - Surface, Feather Edition for Substance Designer lets you create procedural PBR feather textures for 3D and 2D works. Comes with 2 manuals and a 4-part, 2h+ video tutorial.
Artstation: https://cutt.ly/lfcMRb3
Gumroad: https://gum.co/htgsurfacefe