It's tkaing me 5 minuets of writing this snce that avater is forcing me to stare at the cieling, but...
Quesiton 1: Are all normals facing the correct direction?
2: What about smoothing? I think I saw something like that once on a model I imported because I hadn't creatied smoothing groups for it and it was all still a bunch of obvious tris.
If neither of those things helps, click on the mesh extension to the right in the animation browser, there should be a level of detail option there. Change the LOD to a lower number and the mesh should stay more "full" the further away you are, though that'll obviously decrease perforamnce a tad if it's too complex.