It does look like the Luxion render engine, I found their 3dm to obj converter is not very strong and that's what you get, the sliver effect all the time.
Obj import should be fine, don't bother with quads/tris just use triangles option in MoI because the Luxion converter will just split the quads into triangles anyway.
Step should work well, iges is hit and miss.
Looks like I'll have to download the demo and have a play seeing it's only US$149 with no res restriction, it'll better value than the 800X400 limit I have now with Hypershot/Keyshot.

Thanks tijai, the PDF looks great!

Cheers