This is a test piece to evaluate how dry your filament is before printing a larger model with your filament. The default filament is set to TPU, but it is useful to evaluate Polycarbonate, PETG or any other highly hygroscopic material. 

The images show TPU (green) and PC (Bambu clear black) that have been properly dried. There are no bubbles or holes in the print.

Filament that is not properly dried will present surface imperfections, small blowouts or visible or holes in the wall of the model. Transparent filaments will present clearly visible bubbles.

Note: Timelapse needs to be disabled to if you want to prevent the seam that is pictured in the images using transparent green TPU, however the seam is irrelevant to interpreting results.