Seems nobody got you, but i`ve been struggling with this for a while as well. DVA seems to get it right, kinda, wouldnt it be a simple way of making it so that when you turn into a vampire race that no changes occur to the meshes/textures? Not sure, not a modder, just dabbled with installing things and trying to understand files and how they interact with each other. Yes, having the same neckseam problem, works when i add custom textures with npcs that are not bound by scripts from the game, hence rely solely on the textures you`ve downloaded. One option would be to do it the way Brehanin does and make it a "half-vampire" transformation with no changes other than the eyes. Another way would be to manage to somehow change the vampire body texture along with the vampire transformation to match the head, since the head changes. Mmmmm Dynamic Vampire Appearance gets how to dynamically (haha) change the eyes from a vampire based on scripts. So there might be a good place to ask for something like this. Anyway... Ive settled for manually adding vampire eyes through npc editors and downloading changeable eyes to vampires till i see something like youve suggested on this forum appear. Good luck sir