Hello, how do I rebuild such a mesh (obtained after the knife tool)? It’s not possible to smooth properly because of this. The method of holding the shift, working with the mouse, and releasing the shift is not sufficient for this.
Hi @Barrel ,
You will need to retopologize your mesh in some fashion to clean it. This may be necessary to do after using any function that redraws the geometry in ways that results in suboptimal topology. The method you choose to do this will depend on the stage of your process your are in, and how much detail you need to transfer from one mesh to another. Sorry for the lengthy section that follows, but there is a degree of nuance involved here.
In an optimal workflow fine detail should not be added until your form is finished and stable, or close to it. If you are still in the form-shaping stage of your process then Dynamesh may be a quick and dirty way to resurface your mesh with topology adequate for the purpose of further shaping and mid-level detail sculpting. Dynamesh can be used frequently as long as the detail threshold does not exceed Dynamesh’s ability to capture it.
Note that Dynamesh has a practical limitation to how much detail it can capture. It is designed for speed not for extreme detail, which is why it is most useful when establishing the form of your mesh. If your form is stable and you are looking to move on to fine detail sculpting, or if your existing mesh has more detail that can be captured by the Dynamesh process, you will probably need to recreate your mesh with higher quality topology, subdivide and project the detail from the original mesh onto the new one. This process can be used to create a new multi-resolution mesh which is the recommended form of the mesh for the purpose of fine detail sculpting, painting, posing, and texture creation and export.
ZRemesher is a slower way to retopologize, and can only be used to create lower poly versions of the mesh. It will not capture fine detail by itself, but it creates higher quality topology suitable to become a new base level topology for a multi resolution mesh.
If you are looking to remesh a lower poly mesh mesh–especially one with hard surface elements–ZRemesher may provide better results than Dynamesh. Otherwise it can be used to create a new base level topology which can then be subdivided multiple times and have the detail from the original version of the mesh projected onto it, using one of the various methods.
Note that in some situations, it may be necessary to manually retopologize some or all of your mesh, depending on your output needs.
After any session in which you have been redrawing the topology of a mesh, be sure to check it for issues with Tool> Geometry> Mesh Integrity> Check Mesh before moving onto any stage of your work where you need the topology to remain stable.
Good luck! 