[Kreuger]

Judging by the armor in the picture, I'd say you're probably right, Mark II.

 

[Kreuger]

I don't know enough about the 30k setting to know which is more appropriate.

What program are you working on? I actually studied 3D modeling and animation in university. . . a while ago.

 

[Kreuger]

After reviewing the legion models I'm amending my assessment. I now believe he is in Mk IV armor with a studded pauldron and sabaton. The vent at his throat and the chest power cables suggest Mark IV to me now.

 

[Kreuger]

My suggestions are more about detail than 3D specifically.

It's also hard to render solid criticism with only a single perspective view.

But. . . here goes:
The shoulder trim isn't quite right. The chest straps/cables look like they should sit further out from the armor. The thigh attire loss too wide compared to the knee pads, and might be coming in slightly off angle.