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TL;DR: What is the best way to make the selected part in the image an as smooth as possible extension of the surrounding curved surface?

I've been searching extensively the past hour, but cannot find the Q&A that I am looking for. I am trying to smoothen out pits in a curved surface. This is my mesh:

The mesh with the pit still in there

I have been asked to create a snap fitting for an airpod from this 3D scan. To do so, I am gonna subtract the shape of the airpod out of a bigger block. But to to that, I need a smooth surface to start with. I can not make a snap fit from an airpod with pits (you wouldn't be able to press the airpod in the snap fit).

I tried doing a limited dissolve, after which I deleted all the surfaces that were part of the pit. The hole that is created this way I tried to fill with the Fill and Grid fill functions, but this either gave non smooth or irregular surfaces.

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    $\begingroup$ For editing 3D scan data I'd recommend using MeshLab. Remove the problematic areas in Blender, export it for instance as .ply and open the mesh in MeshLab. Use Filter > Remeshing, Simplification and Reconstruction > Screened Poisson Surface Reconstruction to fix the mesh. Export the mesh labeled Poisson Mesh. $\endgroup$
    – Robert Gützkow
    Jan 27 '20 at 21:08
  • $\begingroup$ Thanks mate, I was looking for a quick fix and did it with sculpting for now. My client didn't have any time to lose and I had no time to install MeshLab, I will definately remember this for next time. $\endgroup$
    – Anteino
    Jan 28 '20 at 14:08
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One way is to use the Cast modifier.

  1. Select the area you want to 'smoothen' and add it to a vertex group (I named it ball part)
  2. Add a Cast modifier set to Sphere and limited to the vertex group.
  3. Use the Factor, Radius and Size sliders to correct the shape.

enter image description here

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    $\begingroup$ Thanks :). But I ended up using the sculpt tool, the result did not have to be super accurate so even with no experience at all I kinda managed to do it that way. Only after I was finished I read your comment :( $\endgroup$
    – Anteino
    Jan 28 '20 at 13:49
  • $\begingroup$ You're right, sculpt tool is a very good solution :). Good luck with your project. $\endgroup$ Jan 28 '20 at 15:53

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