Hi, I'm using this texture pack which is really, for the most part, reduced Qarl textures. I noticed that it has meshes too but I don't see any difference so far. I compare some of the meshes in Nifscope but I can't see any difference, say Imperial architecture. I wonder if these meshes are just to correct a little detail or what. Here's a link of this texture pack:

http://www.tesnexus.com/downloads/file.php?id=18829

I'm not going to download the files to check for myself, but my guess is that the meshes for parallax mapping (which has to enabled in the .nif).

Yep.