Hi Martin, did you apply any modifiers to the mesh like doing sub-d smoothing on it in Silo? If so that will probably generate a kind of mangled result, in order to do sub-d smoothing very well the mesh needs to be specifically constructed to have a sub-d friendly topology.

If it just looks like that during modeling time it's possible that Silo just does not display smooth vertex-normal shaded stuff for it's real time display, a modeler's real time display is not really designed to look the same as a "final quality" renderer is supposed to.

So I really wouldn't make any judgement on what Silo is doing just based on their real time display, you would need to export out from it in OBJ format and bring that into a rendering program to do the actual render.

- Michael