In quite every tutorial it says: You can work on the textures in a program like gimp or photoshop. But they don’t explain how to do that. Does anybody know a good tutorial which shows this? For example if you are going to texture a sword. Then you want to have some metallic look and also some variation in it, because it looks boring and fake without. And I think this can be made in gimp or photoshop (in my case gimp). But I really don’t know how.