This is a SolidWorks simulation tested design for a corner suspended shelf, held up by tacks. It's only meant to hold very light objects! It requires a perfectly honed-in and leveled bed and printer to print properly, but produces a great looking and functional corner shelf.

In the attached image, the yellow shelf is this design (the picture is relatively cluttered).

Creality

Ender 3

No

Yes

150

50

This design has only been tested with PLA.