Hello Leo,
thank you for putting this pack for free, as well as all your other packs. It seems to be a big amount of work and the result looks pretty good!
Although, I have an issue when I'm importing the FBX back in blender, the materials show gradients in incorrect colors. I'm pretty n00b in Blender (and 3D in general), what I did was Import > Import .FBX, then when I saw the missing textures, I did External Data > Find Missing Files in the folder of your pack (folder containing the FBX, Images, and Textures subfolders).
Do you know what is going on?
Many thanks.