Low Poly Model to Look Like High Poly Model

Development Asset Creation
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Hi,

I’ve made this model in ZBrush, which I then rendered in KeyShot and Photoshop:

131396-madagus+bust.jpg
131396-madagus+bust.jpg1920×1451 263 KB

And I’m trying to get that sort of quality in Unreal. I’ve made some 8k texture maps etc, and am using the content example skin shader:

131397-b.png
131397-b.png1116×779 187 KB

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But, when I apply that to a lower poly mesh (the one at the top was 14million polys), I get this result in Unreal:

131400-capture.png
131400-capture.png1018×577 301 KB

That particular mesh has 935k polys (I’m only making a short film so I’m not too concerend about optimisation). But I would expect much better results using a mesh with that many polys and an 8k normal map baked from the 14m poly sd level shown at the top. Why am I losing loads of detail?

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Edit: When I view the mesh in it’s own separate window thing and apply the skin material, it looks a lot better than that picture in game.