MeshBuilder.Cylinder - Cap Segments?

Is it possible to control the cap segments when creating a cylinder or a disc?

I’ve tried tessellation and subdivision, but nothing happens to the cap.

This is what I am trying to achieve:

All meshes are created from triangles so it is not possible since your intended cap has quadrilaterals. If it is just the visual appearance you are trying to achieve then you could try setting up a material. It is possible to have different material on the caps than the curved body, using faceUV.