I am new to Rhino 5, and 3D CAD in general. I have three surfaces that meet at a point, and I would like to “file” that point down so it is rounded. FilletSrf produces strange results or doesn’t work at all. Other surface editing tools seem to be designed for two surfaces only.
A simplified version of this problem would be simply to round the corner of a box. If FilletSrf should do that, then what should I look for in my curves and edges that may cause the operation to fail?