Fillet edge in sharp angle

how do I make a round “weld” like the gray object? If I choose fillet edge, the top surface will stay open and is not reconstructed.

Hello - use MergeAllCoplanarFaces (v7) or MergeAllFaces (earlier versions) before adding the fillets.


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FilletEdge the outside edge with the desired outside radius.
FilletEdge the inside edge with the desired inside radius.
Note: For constant thickness Inside radius = Outside radius - thickness
If the above does not work post a .3dm file with an example of the input and the unsatisfactory output.

Omg that command is like a wet dream for me. THANK YOU!