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I have a rounded "onion looking" shape and have used a Boolean modifier to cut a hole out of it:

Enter image description here

Now I'm trying to smooth out the edges so there are no harsh corners on the shape. How can I do this?

Here I have highlighted the area I'm trying to smooth out:

Enter image description here

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Once you've applied the boolean, rearrange the topology so that it's a good one, then bevel the edge:

enter image description here

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  • $\begingroup$ Thank you so much! Can you explain what you did between image 3 and 4? It looks like the bevel becomes larger, trying to learn that step. Thank you $\endgroup$ – Joe Jun 2 at 5:26
  • $\begingroup$ I think I just moved along the edges (select an edge loop, press GG and move along Y) and scaled it? $\endgroup$ – moonboots Jun 2 at 5:40
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First in first, the faces cut out by boolean modifier will use the data from that cutting cylinder. So you need to set that cylinder smooth in shading.

enter image description here Note: I am using bounding box to display that cylinder

Due to how boolean work, you might want to apply sub-modifier before boolean modifier and make all your object smooth.

enter image description here

And also, vertices cannot be smooth by sub-modifier after boolean modifier (the crease value seems to be dropped), so you will need to add sub-modifier on that cylinder too.

You can download this example here:


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