Best ways to make polysurface with sharp edges?

Hi everyone!

I’m new here and on Rhino :slight_smile:

I’d really appreciate any advice on what’s the best way to model a polysurface with sharp edges, but rounded corners.
After filleting the extruded surface didn’t work, I tried sweep 1 rail and by doing it in sections I managed to get to this point… however I can’t do boolean union.

How to make a joint polysurface from here? And what’s the best way to model a shape like this other than sweep 1 rail?

Thank you so much!!

Hi Georgina - I can’t tell if the parts are all the same - it looks like maybe not but in the simple case, this is what I would do:



Hi Pascal,

Thank you so much for taking the time to answer. Apologies for not sending an image from the top before, but what would you do if parts are not equal?
I also tried your version with polar array but I can’t make the parts match perfectly like you did, so still can’t do boolean union - how do you do that?

Thank you again,

Hi Georgina - in my example,l the trim leaves open edges so Join is what you’d use, not BooleanUnion (see Help on these commands - they are related, but not the same)
Please post what you have - I’ll take a look.


1 Like

If I get this right you are trying to Sweep1 circle and have the sweeps come to a point.

If that be the case, you either need to have the sweep paths cross and go far enough past each other to come to a point (at right) OR you can place the cross section on the INSIDE of the sweep path rather than the center (at center) (probably the better solution)

1 Like

Wow this worked! :smiley:
Thank you so much Pascal and Miano, saw your answers and tried the second suggestion and finally worked!