Fillet edge of joined solids

I have a few solids that are merged to one solid with boolean union. I’d like to continupously fillet the top edge as shown in the picture. I’ve tried everything but I keep failing. There are always edges that are not filleted.

Does anybody have an idea what I could do ?
Thanks for any help…


Assuming the top faces are coplanar, first run _MergeCoplanarFaces


Yes! That works indeed!

Thank you so much for that hint.

Now I’ll read the documentation of _MergeCoplanarFaces to understand the logic behind it.
Thank you Gijs!

cheers, Rolf

also you can use curveBoolean in the input curves to have a single perimeter to extrude