F.ip2

If you want to use blender as the rendering engine it is doable. I'm attaching some images to look at. It is as Michael says you will need to play with the exporter settings. the middle object is just exported out at default values (Angle: 12 as Ngons) The one on the left is (angle: 3 divide larger than: 1 all avoid small than: .05 Ngon)
the one on the right is (angle: 3 divide larger than: 1.00 all, avoid small than: .05 quads and triangles) all OBJ
you will notice on the render there are artifacts on the NGon object to the left but on the object on the right they don't show up. I have found the Quad and tri to be the most reliable.


Cheers

Val