I thought that hollow patterns on top of the model are impossible. But I was wrong. After many hours of 3D modeling I figure out how to control every single line of filament printed in each layer. This gives unique opportunity to visually draw each line that is printed exactly as I need to. With start/end points almost under total control.
Special 3D modeling technique was used to make this model. I know this hollow pattern can be printed up side down without any trouble. But this model can be printed as a table WITHOUT SUPPORTS.