Martin,

Well, tried importing a dwg file from AutoCAD LT to Rhino Evaluation... nothing shows up, regardless of zoom. Then I exported to a 2010 dxf and nothing showed up. Guess Rhino is out for me. dxf imports in Shade3D and Houdini. Shade3D handles everything as a drawing, so everything that is not the object is still the drawing... a sure argument for layers. Houdini does import dxf(vertically.. have to rotate it -90 degrees) Guess I'll download a 30 day trial of autocad... lol.