For the record, something else is going on too. Maybe that screwed up the quality settings. Now after a couple of improved renders as above, I find that every couple of renders all my menus across the top, render, display, etc. pull down off (unbold) and unresponsive. When this happens lines indicating the directions of light also are in the document window. Then it looks like it is going to render, but does not. Then I check the menu at the top and the items are embossed, off, unbold, rather than dark and responsive to clicking. So I may have to reinstall anyway. If there are any suggestions, please let me know.