Ssssso I just realized after buying that there doesn't seem to be a Substance file or anything...? is there no way to get access to editable textures?
I'm very sorry, but I don't have Substance Painter! I made the textures by hand/with the HAS Paint Layers plugin for Blender + working flat in Krita, and my workflow is messy and destructive. HOWEVER: It is possible to import .png textures into Substance as static layers; the "main" texture the gryphon comes with is basic, blank-canvas white for this purpose. I may or may not be able to eventually provide Substance files here. If I do ever rent a month of Substance and get a big ambitious paintfile created, it will be included as an update free of charge.