The enclose feature is merged for the cylinder. I will let you know how it works soon. Basically :  BABYLON.MeshBuilder.CreateCylinder("c", { arc : 0.6, enclose: true }, scene);This will close the section of an opened cylinder. Maybe useful to make pie charts, for instance. I will tweak it (not already done) for the user can set a different color and texture per surface : top and bottom cap, tubular surface (current behavior) and each for each quad closing the sliced cylinder. http://www.babylon