Brilliant. I understand perfectly what you mean. I think in my case is not so serious cause i use a 3d models just for inventory items. Just one as a time will be viewed, and it will be some kind of 20 or 30% of the screen.
I also realize that in Lightwave when you deactivate the Smoothing for the surfaces, when i import the file in blender, the issue goes out. But of course, i miss the smoothing (check the attachement).
I will try to lower as much as i can the polycount and use normal maps to make the items looks better.
Thanks for your replies, they helped me a lot. 
