Most Lit Printz designs are sold two ways: as a physical print we make and ship, or as a digital file you print yourself. If you picked the digital option, you'll receive a 3MF file. This guide explains what that file is and how to turn it into a finished print at home.
What is a 3MF file?
3MF stands for 3D Manufacturing Format. Like the older STL format, it describes the shape of a 3D model. Unlike STL, a 3MF file can also carry extra information, such as how parts are arranged on the build plate, colors, and sometimes print settings. That makes it a convenient way to share a design that's ready to slice.
Where to find your download
Right after checkout, you'll get an email with your download link, and the same link appears on your order status page. If you don't see the email, check your spam or promotions folder. Save the file somewhere easy to find, like a folder for your print projects.
Which software opens a 3MF?
You'll need a slicer, the program that converts a 3D model into instructions your printer understands. Popular free options include:
- Bambu Studio, for Bambu Lab printers
- OrcaSlicer, which supports many brands
- PrusaSlicer, for Prusa and many other printers
- UltiMaker Cura, a long-time favorite for a wide range of machines
Open your slicer, choose your printer profile, and use File, then Import or Open, to load the 3MF. Some slicers will ask whether to load the settings saved in the file. If you're using a different slicer or printer than the one the file was prepared with, it's usually best to load the geometry only and use your own trusted printer profile.
Our tips for a clean first print
- Check the scale. Coozies are designed around a standard 12 oz can and candle holders around a standard 3-wick jar, so avoid resizing unless you know you need to.
- Look at supports. Detailed designs may have overhangs. Preview the sliced layers and add supports where the slicer shows areas printing in mid-air.
- Dial in the first layer. A clean, level first layer prevents most failures. Clean your build plate and run a quick calibration if it's been a while.
- Be patient with big pieces. Larger designs can take many hours, and some take more than a day. Make sure you have enough filament before you start.
- Have fun with color. The digital file lets you pick any filament you like, including silk and glow-in-the-dark.
Need help?
If a file won't open or a print isn't turning out the way you expect, send us a message with your printer model, slicer, and a photo if you have one. We'll help you figure it out. And when it comes out great, we'd love to see it on our reviews page.