Join and grounds

Hello, at “Join” 2, 3 of surfaces an object in certain cases ceases to submit to the framework and loses smoothness. What it can be explained with?

There is more…
Why in an object (mesh) some grounds triangular, and other quadrangular?

In 3D max it looks like all polygons are quadrangular …

It is possible to get rid somehow from triangles?

Hi Modeler3d - Rhino will make trianlges on trimmed edges and joined edges, there is no way around that. You can increase the accuracy of the render meshes in DocumentProperties > Mesh page. See also


It is clear…
I thank!