this is a ghosting test for printers to see if there are artefacts . ghosting is shown in the 3 images above, the right mist one has ghosting along with the right most one. you want your print to look like the centre one. no support's are needed to make this model because it might stop the ghosting and make the test invalid. some solutions to this are to …

• slow the print down
• make brace to stop movement
• add more mass/ weight to printer
• shock mount printer with foam or rubber to table.