OK, broken the problem down, it is apparent that quite randomly, sketchup is breaking an arc (curve, whatever you want to call it) into its constituent lines. I know of the weld tool but frankly this is getting too much. Is there a way to stop this from happening or is it an inherrent sketchup problem? This occurs BEFORE I do anything else with the geometry.

Do we not all LOVE file corruption, something from childhood springs to mind about being sent to try us. It was VERY succesful in this case. Tried again, something with cleaner and sharper lines but to my mind it comes across as a mustang coupe want to be. Oh well, car designer I am not. [image: KjB3_SportsCoupeAgain2.jpg]

The ceiling height is 8' and the width is a bit more than 26' but that is not important. The two characters are different heights. The area behind the television is the kitchen which will have a small breakfast bar the dining area is on the right by the brick wall. The space where the camera is located is access through patio doors to the garden and beyond my mother in law's tongue is a lift and stairs. The building is intended to be 100% less abled friendly so the lift is not one of those afterthoughts stuck in the space of a closet. PS. my mother in law's tongue has been scaled down so as not to be too intrusive (unlike my mother in law) and is decidedly less prickly too.

Thanks for the info, it's appreciated.