I have a model ready for Nifskope and I wanted to link different parts of it to different textures. I'm sure I just add each the same way I would a normal 1 piece mesh. Does Nifkope achieve this by polygroups or would I need to import all the pieces as its own mesh and combine them in Nifskope? Thanks.

Different ways you could do this. Either import each section of the mesh individually and assign the textures via their respective BSShaderTextureSet block, or use a mega texture (All the textures laid out on a single image) assigned to a single object.

mmm, tacos.

One big texture is fine, as long as it isn't 8192. I'm sure the quality will be good if it was just all on one UV texture map of 2048 or 4096.

I'm trying to decide if having separate textures is worth doing. It's be easier to work with as far as texturing goes, but if there's really no difference in quality then I don't need to do it.

I'll do one piece and see how it looks.

i would suggest 1 texture sheet. i cant think of a good reason why you would need separate texture sheets on a non-customizable weapon other than for using multiple shaders

Maybe for quality? I don't know, I see a lot of weapon modders do it this way. Same for armors. I'm still gonna do 1 texture sheet as I think it will still look good.