Red Mario cap printed through a rough 30 hour run

Oct 24, 2026 Last reply: 10 hours ago 3 Replies
Jump to replies (3)

The hardest part of this build came mid-print, when the prime tower got knocked over. On top of that, the duct tape would not stick, and the tape ended up bending the flow stopping bar. Rather than restart, the maker bent the bar back into shape, fixed it, and readjusted the tape height, then let the job run on. Getting past all of that without scrapping a long print is the part that stands out to me.



The print itself is a red Mario cap made for a Halloween costume. It has a domed crown, a visor brim, and a front emblem with a raised circular M logo. The maker ran it on a Bambu Lab printer with red filament, on a textured print plate, and used the H2C to keep waste down.



A few construction choices deserve a mention. The entire bottom rim of the cap sat on supports, with PETG used as the support interface to prevent scarring, and the second nozzle handled that interface layer. Blue and black tape sits around the purge tower, and scissors came out to trim random filament tangles along the way.



The run took 30 hours and finished after that rough ride, though the hat is only part of the costume, so the rest of the print is still to come.


The PETG support interface seems like the smartest call here. With the whole bottom rim riding on supports, any scarring on that surface would be hard to hide on a costume piece, so spending the second nozzle on the interface layer looks like a fair trade in print time for a clean underside.

Curious how the support interface came away in the end. With PETG sitting under the entire bottom rim of the cap, did it release cleanly from the red filament, or was there any cleanup needed on the underside of the brim before the maker called the hat done?

One idea worth trying on a future run: a dedicated self-priming section instead of a prime tower. Since the tower getting knocked over was the scariest moment of this print, removing it from the equation entirely would protect a 30 hour job from one accidental bump near the end.

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required