A problem for Rajaa.
I wanted to make a tapered extrusion; rhino apparently unable to do so, but at the red edge you determine a problem (if you zoom in on the red border you see the defect).
Whit Autocad this extrusion is successful, it keeps the red edge and perfectly closed surfaces.
You could check you?
Extrusion tapered incorrect.3dm (177.6 KB)