Overusing N-gons and misunderstanding topology
N-gons are shapes that have five or more edges or vertices. Such shapes can be tempting to use when making 3D models, but their multiple sides make it difficult when it comes to sculpting later in the animation process. Instead, 3D modeling experts encourage the use of quads, because they can be easily subdivided.
Beginners should also avoid using triangles, or tris as they’re known by 3D modelers, as they can cause similar issues when it comes to animating.
Understanding the use of polygons is also key to grasping the wider issue of topology. This means that quads should be kept as square as possible, vertices shouldn’t break the flow of any edges and subdivisions should be spread out evenly. Modelers should regularly go back over what they’re making and check for mistakes to ensure that these simple rules are being followed, so they don’t need to overhaul or restart their project from scratch.
