How to create an octagon hole in the 3d mesh

Circular holes are one of the most used types of holes in 3d modeling.
In this short tutorial, we will create a circular hole that has eight edges (octagon).

1. To get started, create a quad polygon;
2. Add two support edges;
3. Add two perpendicular edges, crossing through the center;
4. Select a central vortex and use “Chamfer”;
5. Use “Connect” to add two perpendicular edges in the square;
6. Select a central octagon and use “Circularize” or “Spherify”;
7. Connect edges around the octagon with the corners;
8. Delete a central face to get a hole;
9. Add support edges for the correct subdivision.

This way we created a circular hole that gives a smooth topology after subdivision.

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