I'm trying to smooth cone's side like I did for a cylinder using Edge Split and Subdivision Surface.

However, the cone (red one) is changing its shape at the top: enter image description here enter image description here

How can I prevent this?

  • 1
    $\begingroup$ You could try adding an edge loop very close to the top. $\endgroup$ – Ezra Apr 14 '17 at 21:04

The easiest way is to actually use a cylinder. you can then shrink the top to a very small size in order to make it feel like a cone. Then add an edge split modifier and the SubSurf. The reason a cylinder is better is that the edge split doesn't work really well for triangles, and the cone basemesh is made of triangles. (You can't add edge loops on a cone).

Cylinder-cone trick

On the screenshot I made the cylinder top big so you can see it's actually a cylinder but feel free to shrink the size as you want.

  1. I extrude the bottom ring just a tiny bit like you see on the picture.
  2. Then I took the original loop above and performed edge slide all the way up to where you see the tiny loop up top.
  3. Then I extruded the bottom loop again a tiny bit like the first time.
  4. And finally I made the bottom loop completely sharp.

Smooth Cone


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