I used the case at the top right

The process for printing is no longer as easy as that for an office printer or laser printer for the reason why it is used by melting a materials like a plastic, which means the materials become much softer than before by getting heat. Therefore there is a possibility for itself to be collapsed as piled up. But the advantage of 3d printing is that you can scan, scale, rotate, duplicate, skew, and add easily.

The demo of outputting a object in the class at ITP/NYU.