The picture basically sums up my problem. I have cylinders from rhino that will either show up as cubes or these weird shapes when I toggle the NURBS function.
Just to help the tech guys can you answer the following please ...
Windows version ?
Rhino version ?
Are you using the Rhino Plugin or doing import via 3DM ?
Martin
I used to have issues similar to this when Rhino 5 first came out.
See if this helps... There is a setting in Rhino, where extruded shapes are simplified (almost like a block instance), and not considered by Rhino to be a polysurface until you explode the object. BTW, exploding one of these simplified shapes one time doesn't leave it unjoined, it just makes it a normal polysurface.
If that ends up being the problem, you can turn off the simplified extrude in Rhino.
As Robb63 said, by default Rhino5 uses Extrusions instead of Polysurfaces for basic shapes like Cubes and Cylinders. An extrusion is just a planar curve and a vector that indicates the direction. So, there are no Nurbs informations in the files.
Just _Explode and _Join the objects to transform the extrusions in polysurfaces
the _UseExtrusions command allow to switch off the extrusions