I looked at the OBJ file, why so heavy on the mesh. Export from MoI using the defaults possibly even lower, then use the SubD or smoothing from Blender to adjust the mesh density to what you want. I have had the same problems with OBJ being imported into other packages where the other app says that there are shared vertices and they cause these problems you are seeing here, where the Poly surface is drawn into the middle of the one before as if it was trying to triangulate but then it leaves the gaps. I hope i have that right ... But for me the cure was to model in MoI and then export out as quads and tri's and to lower the resolution on the mesh to being really coarse allowing the poly-modelling app to take care of the smoothing and SubD stuff.

HTH

Martin Spencer-Ford