This is mostly a resource for modders who work with the vanilla body, but can also be used as a mod.
One issue I found myself running into a few times when doing vanilla FTM ports of gear is that there were no male vanilla leg gears that had the appropriate amount of skin underneath for whatever I was porting, and manually filling in the gaps in the skin would lead to wonky face normals. This mod fixes this issue by nabbing the full waist area from an NPC gear (e9229), giving it the appropriate vertex colors for player body models, and porting it overtop the Smallclothes Legs, NPC Smallclothes Legs, and Emperor's New Breeches. It's the exact same size legs and butt as vanilla models, and uses vanilla skin textures, just nude.
Although this is mostly intended to be a modder's resource, it can also technically be used as a vanilla nude player body mod for males, but please keep in mind that there are NO MODELED GENITALS at all on the groin. It's a smooth, featureless, skin-colored bump between the legs. If that's your thing, great! Feel free to use it in game as-is.
This mod uses only the vanilla body textures (skin mat A); TBSE is not needed.
As these are vanilla assets, please feel free to use them in any modding projects so long as you credit me, although I would greatly appreciate if you abided by the edit permissions in my bio. PLEASE do not use this mod to make NSFW of minor-aged characters.
For a female talls version of the same concept, check these out:
pinki's Chabis Vanilla Devkit (
https://www.xivmodarchive.com/modid/117896)
Dia's Vanilla Body Base (
https://www.xivmodarchive.com/modid/146887)