Importing Rhino file into keyshot

[Arnaud]

And Keyshot does take only those objects which has been meshed in rhino, seems like Keyshot does not has a mesher of its own

For some CAD import, KS apply its own tesselation.
But for Rhino file, it read the tesselation created by Rhino. If your file has been saved in wireframe mode only (or using "Save Small" option which detete all meshes) KS is unable to find geometry.