I think the creasing is down to Wings rendering quite a low value viewing angle. I see it a lot wth Wings screen shots so I assume it's not adjuatable. The model looks fine, the design is personal so greeble away! As Lux mentioned, give the long poly a miss - poser hates them.

Some physical-based and unbiased engines don't handle those kinds of polys very well either.  Long, unconnected edges can cause raycast bias issues in some engines.  Plus, they can also present UV problems across the model (texture stretching and non-uniform unwrapping results).  It's best to keep your topology as uniform as possible, for those reasons.  However, the OP did suggest this is a game asset, so I'm assuming it will end up in Unity or some game engine.  In that case, UV unwrapping can still present an issue with long skinny polys, even if shading isn't an issue.

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