Retopologizing a model with proper loop flow is an essential skill for any modeler, particularly when working with flexible, organic surfaces such as cloth, skin, character body etc.
To achieve a clean topology, it’s crucial to avoid using T-vertices as much as possible. T-vertices occur when edges converge in a T-shape and should only be utilized if necessary for the overall shape of the model. In the example image, these vertices are marked with yellow color.
The image shows:
- ⇅ Loop flow direction.
- ▨ Loop gap example;
- ▨ Loop flow;
- ▨ Flat surface;
Improper use of T-verts in retopology can lead to gaps in loop flow and poor subdivision results, causing deformation of the mesh. In some cases, such as flat areas where there is no better alternative, T-verts can be used. However, it’s best to minimize their usage whenever possible to ensure optimal results.