Blender Question Regarding Filling Mesh Holes + Texture Distortion

[xenodoax]

Experienced modders: please help with this Blender texture issue I'm facing.

 

I'm trying to fill in holes in the mesh manually using Blender by extending vertices and filling the polygons as I go along.

First off, if there's a better way to do this, please enlighten me.

 

Now for the issue I'm facing with the above method. My texture keeps getting distorted when I export and view in game.

Is there a setting in Blender I'm missing? I'm trying to match the geometry of the mesh as best as I can.

 

I've exported an image of the issue in game and the corresponding mesh in Blender.

Any help is appreciated as I'm self-taught with Blender and don't know every part of it.

 

[tk2004]

The textures are assigned by UV Editing in blender.

Spoiler

 

Filling the holes is a daunting task, so it's easier to use the finished body mesh included in other mods.