I've been working on this product for a couple months, and now it is finally ready. The Creature Skin Toolkit features brushes (59 in total!), misc raw/source textures, and 23 lovingly-crafted, seamless PBR materials. Here are some images of the materials, rendered in Marmoset Toolbag 3, and a peek at some of the brushes. Many of the raw, unedited source images are also included so you can make your own brushes or new texture products, restriction-free.

This will be available here in my Artstation store this Friday, Jan 8th. You can also pre-order it on Gumroad (https://gumroad.com/l/creatureskintoolkit) for just $5 (price goes up on release). Comments & feedback welcome!