This is not a mod rather a resource for modders. As requested by Sword_Of_Geddon. I have converted a few units: a Space fighter that looks like a space shuttle, and a Sci Fi soldier which looks like a white halo man.
They are around 1000 vertices a piece, its not bad but they are not efficient.
For ease of installation here are the art defs:
Credits:
https://www.turbosquid.com/3d-models/free-obj-mode-space-fighter/611566
https://www.turbosquid.com/3d-models/free-sci-fi-soldier-3d-model/1018619
They are around 1000 vertices a piece, its not bad but they are not efficient.

For ease of installation here are the art defs:
Code:
<NIF>Art/Units/FunkySciFiUnits/SpaceShuttleFighter/SpaceShuttleFighter.nif</NIF><KFM>Art/Units/FinalFrontier_Fighter/Fighter.kfm</KFM><SHADERNIF/>
Code:
<NIF>Art/Units/FunkySciFiUnits/WhiteHaloGuySoldier/whitehaloguysoldier.nif</NIF>
<KFM>Art/Units/FunkySciFiUnits/WhiteHaloGuySoldier/NewKFM/marines.kfm</KFM>
<SHADERNIF/>
Credits:
https://www.turbosquid.com/3d-models/free-obj-mode-space-fighter/611566
https://www.turbosquid.com/3d-models/free-sci-fi-soldier-3d-model/1018619