Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Adding new textures to create materials?

So how do you add new textures to create materials from? I made a few test .dds texture files 512x512 but when I try to import them in my new folder and new package, the package is empty and i can't press ok. ANy idea what i'm doing wrong?