Sometimes an object needs a cylinder or drum shape with flat ends, and the ends must be unwelded from the sides to make sure that the join renders sharp. In that case, I would expect any sensibly written mesh modeller program to make each end with *n* vertexes round the edge, and one vertex in the middle, and therefore *n* triangle sector faces and nothing else. But one commonly used modeler (Ray Dream Studio, I think) keeps making such drum and cylinder end surfaces like in this image, with an outside part, and an inside part (marked with yellow here), separated by unwelded loose edges (magenta here). The first few times I saw this, I thought it represented some feature of the object that the mesh was a model of. But it turns up over and over again, in all sorts of parts of all sorts of things, and always the inner and outer parts of the drum-end are in the same group and the same material. In a model like e.g. a scuba regulator or a vehicle motor that has many drum and flat-ended cylinder shapes, all these drum and cylinder ends made in this cobweb style instead of as *n* plain sectors, add up to a massive excess of faces making the final geometry file massive. And the inner part being separate means that an automatic polygon-thinner-out can't get rid of the mess properly. PLEASE how can a Ray Dream Studio user stop this from happening and force it to make these drum and cylinder ends in the plain proper simple style with *n* sector triangle faces and nothing else!?!?