I tried one of the default skins on the hud, and I cant see this issue...
The default skins in the Maitreya HUD use an alpha channel on the neck fix sleeve to 'blend it'. Omega does not allow any alpha on the skin. That's the diffrence you noted between the Omega Applier and the preloaded skins.
Since you made an Omega applier, it seems you own the textures for your skin, I'd suggest putting them into a Maitreya skin applier and use the download link provided in the kit to make a proper neck fix texture.
The Maitreya Skin Dev kit is available at no charge in the main store on teh Lara display, upper right corner.
I had this same problem but around the top of my head and i have no idea on how to get rid of it
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Maitreya and the Neck thing
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I had this same problem but around the top of my head and i have no idea on how to get rid of it