We try to create the illusion of different forms crossing each other in the digital model and make them into ceramics by 3D printing. By enlarging the print bond, we can get the threshold value of the material support and explain the secret of the shape crossing illusion. How does the weight of the upper part of the clay itself affect the shape of the lower part? How much does it differ from the digital model? Are these deformations controllable, and how does the form of 3D printed ceramics relate to the manufacturing method? These are the topics we explore in this project.