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Below is an example of what I'm talking about.

My constraints are as follows:

  • My mesh is using the subdivision surface modifier.
  • I have to use support loops rather than edge creases.
  • I have to reduce the amount of polygons in the mesh.
  • There is an existing square face, and I want to extrude within that area without changing the topology outside of that area.

So my question is:

  1. What does the ideal topology look like in this situation, assuming those constraints?
  2. What's the most efficient way to create it, starting with a square face? Are there any addons that can help?

example

Edit: Here's an an example solution. example

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You can use this kind of topology:

enter image description here

Same thing:

enter image description here

How I would go to create this topology? First create a 3x3 grid:

enter image description here

Bevel what needs to be bevelled:

enter image description here

Create these edges and dissolve these others:

enter image description here

You should end up with this:

enter image description here

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  • $\begingroup$ Can this solution be used if I only have one face that I must work within (as stated in the question)? $\endgroup$
    – P. Private
    Feb 23, 2023 at 9:39
  • $\begingroup$ what do you mean by one face? Maybe show your wireframe if it helps to understand? $\endgroup$
    – moonboots
    Feb 23, 2023 at 9:40
  • $\begingroup$ Added an extra image to the question. $\endgroup$
    – P. Private
    Feb 23, 2023 at 9:45
  • $\begingroup$ If your solution works fine without pinching or artefacts, then I guess you can use it $\endgroup$
    – moonboots
    Feb 23, 2023 at 10:15
  • $\begingroup$ I see, so IIUC typically you would just start within something like a 3x3 or 4x4 grid of faces, then inset from there, since that gives you the support loops for free. $\endgroup$
    – P. Private
    Feb 25, 2023 at 8:38

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