Tip: Cutting a Hole in a Curved Surface – Revisit

In this quick Blender 2.5 video tip we revisit a tip we did a while back in Blender 2.49 on how to cut a hole in a curved surface. This tip makes use of the Shrinkwrap modifier and also provides some topology practice.

Original tip can be found here: http://www.blendercookie.com/2009/09/09/tip-cutting-a-hole-in-a-curved-surface/

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41 Responses to “Tip: Cutting a Hole in a Curved Surface – Revisit”
  1. Posts: 1
    Michael says:

    Cool, thanks a lot! I have to model a bowling ball and was having topology issues with boolean operations. I think this is exactly what I needed to watch.

  2. Posts: 35
    Lucas Fowler says:

    Whats with the topology? I really never understood what that meant! But awesome tut! Happy GameEngineing!

    • Posts: 18
      swims says:

      Jonathan should have shown what happens with Boolean Modifier to make it clear. Try it Taco and you’ll understand the moment you click on Apply in the Boolean modifier tab. I guess that’s one of the best example of good vs dirty topology and their consequences.

  3. Posts: 10
    Koczek says:


    This is a great tip from Jonathan. Thanks for that! Also, there are several good tips written by others.
    I think it would be better to shrink a ring of faces instead a single circle to help you with future subsurfs.
    That’s my 2 cents :).

    Happy Hols!

  4. Posts: 45
    FreeMind says:

    There is an easyer way:
    Create the cube
    Subsurf modifier, apply
    “To sphere” the whole cube
    Delete a quad hole in it (select four faces for example)
    Select the whole
    To sphere, makes it round.
    select the whole cube again, to sphere.
    Works on the whole cube without no topology problems.

    • Posts: 45
      FreeMind says:

      damn typos.

      • Posts: 18
        swims says:

        OK for a sphere but not for more complex curved shapes.

        Jonathan gave a method that works with every kind of shape.

    • Posts: 28
      Ron Hatfield says:

      That seemed to work for me, using the fit inside method and took less time.
      Staff, can you comment on this?

      Is it the same thing? When would I use the demo’d technique vs. this one?

      • Posts: 4218

        The LoopTools technique is even better in many cases. Mostly because that’s explicitly what it was designed for and provides more options.

        The main benefit to using To Sphere, is that it doesn’t require an add-on.

  5. Posts: 3
    Mike Kirk says:

    really nice tutorial jonathan!
    do you know how would you go about carving letters in a pumpkin ? would really appreciate the feedback/tutorial on that?

  6. Posts: 4
    Ed Baker says:

    So fantastic and so simple. I always tend to make it by brute force moving vertex by vertex. So much better.

    Thanks Jonathan.

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