There are options for increasing the subdivision level of geometry in modeler under the General Options tab ( shortcut 'O') and for both display and rendered geometry in Layout under the object properties tab (shortcut 'P'). I've found this will usually improve the appearance of subdivision geometry ...

I know this is pretty old now (June), but just wanted to post a reply because it's such a striking image. The main issue for me is the composition of elements. You have the globe and pictures against the wall and somewhat away from the main focus of attention, even though they are by far the more ...

Very grateful for your explanation and the diagram. As a new user I need all the help I can get. Thanks.