Been playing a while now and I right away noticed one of the modding slots is for skins; but I've yet to get any more skins unlocked besides the single "default" option. I'm wondering if they even have any in the game or if it's just there for future stuff/mods.
I had one option for a backpack skin available from the deluxe version (don't judge), but that was all so far. I haven't finished any major quest lines though,
I'm hoping modders use that tab for their new textures. I see a ton of remade guns but I'm holding off until the modding tool comes out so they can be made into skins instead.