A problem with filletings

Hello! I am very new in Rhino -although with some experience in other 3D apps- and trying to understand its workings. I am meeting a problem when filleting edges: there appear some anomalies in their appearance and I still did not find why. I am putting an image below showing the problem. Any idea about it?

Thanks in advance for any help…

(I am working in v.4)

Hello - set the meshing parameters in DocumentProperties > Mesh page to ‘Smooth and Slower’ or some custom setting ( more info here: https://wiki.mcneel.com/rhino/meshfaqdetails )

Does that look better?


Thanks a lot Pascal, now it is ok! : - )