I am trying to make a relatively simple 3D-model. resulted quad mesh is very good (fig). however, when I convert the quads to tris I would get this very narrow triangles which I do not want. the only reason that I change the quads to tris is that I need to export the .Stl file, and apparently .stl automatically change the mesh to triangles.
is there any way to avoid this narrow bad quality triangles?