Rhino Export (or) Import Problem

Hi Everyone

I found that rhino export or import problem. I was export one solid to STEP(.stp) file and import that STEP(.stp) file into rhino. Exported solid converted to polysurface why???


The light-weight extrusion object is a Rhino-only format. When you export those objects to other formats, they will have to be converted.

Note that you can (sometimes) convert these NURBS objects back into light-weight extrusion object with a script that you can find here: