<UV-mapping import is supported in the 3ds-import add-in (which is not <included with ArchiCAD but it can be freely downloaded elsewhere).
But still it is outside Archicad and in German. I don't care about this, but this is still walk around, not solution.
<Smoothing groups is more or less taken care of with this plugin, but <don't expect miracles from ArchiCAD.
I was making a lot of tests, and this plugin makes all object smooth or solid.
<Remove double vertices in export? When I export a model to 3ds max, I <can do that there.
Of course, but that is one more step to do.
<Triangulation? All exported models are triangulated (that is, cut into <triangles). You cannot export a polygon with more then three vertices <(which is very, very common in ArchiCAD geometry) into the *.3ds <format, unless it's triangulated, so the ArchiCAD exporter already does <that. I don't see the problem. Can you clarify?
Actually polygons can have much more than 3 vertices. You say polygon but you think face. Polygon can have a lot of faces. What is a problem is that some 3D packages don't support polygons with more than 4 vertices (ex. blender) triangulation (converting all polygons with more than 3 vertices to polygons with 3 vertices) can solve that problem.