What is the general approach for maintaining good, quads-only topology when encountering an arbitrary polygon with more than four sides?
No matter how hard I try to keep a good topology, sometimes I still find pentagons or hexagons in my meshes. This happens especially when cutting/extruding organic shapes in a box-modeled mesh.
My initial reaction is to cut the hexagons in half to make two quads. But the new quads aren't square at all anymore. I have no idea what to do with the pentagons.
I also encounter eccentric polygons when connecting a highly detailed part of an organic model to a less-finely detailed part. For example, this dog's face has more detail than the back of the head. I tried to convert this heptagon to quads with no success:
Many Stack Exchange questions address this question for specific examples of meshes:
- Problem faced while doing re-topology - can't maintain quads
- maintaining quads when cutting circles into mesh
- How would you cut a shape out of an object using another object?
- How to party add geoetry while keeping good topology (Cat nose)
- Apply complex hole pattern to simple face while maintaining good topology
- How to Remove these Ngon's with good topology?
Most of these answers work under the premise that the number of sides is even or that the large polygon has an even number of faces.