Name's right on the tin. You see the pictures. This mod modifies Elminster's robes to expose and enhance his bountiful bosom.

Installation
Use the BG3 Mod Manager to import the zip file, or extract the .pak file and move it to your mods folder.
Make sure to move this mod to the "Active Mods" table.
Click on "Save Load Order to File".
Click on "Export Order to Game".

Credits
ShinyHobo for the Modder's Multitool
Norbyte for the Blender gr2 import tool and lslib tool
Everyone who contributed to the BG3 modding wiki, I read it religiously :)

Super Secret StuffSpoiler:  Show
Elminster's robe is also available as equipment in the game. It has a pretty ugly neck seam that I couldn't figure out how to fix, so I didn't want to make an "official" part of the mod. But anyway, you can spawn it in if you want Gale, Wyll, or Astarion to have big naturals. Only the human-like regular male body has the custom mesh. Putting it on any other body type just gives the default mesh.
UUID: 4d3e1181-4fcd-4ec8-8006-4d0eaf51af39
Use this in the script extender console to spawn it in:
TemplateAddTo("881ad6a0-4499-4ca3-8bba-9b587d5b1a05", GetHostCharacter(), 1)