Let's discuss the differences between STEP and STL files: A common misunderstanding needs addressing

Core Development Concepts
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TL;DR: Well-made STL files often outperform STEP files in current slicer software.

Many people think STEP files give better print quality than STL files. This isn’t always true. Here’s why:

  1. Slicer behavior: Most slicers (like PrusaSlicer and BambuStudio) turn STEP files into meshes right away. This conversion can be worse than a good STL from CAD software.

  2. Quality comparison:

    • Simple shapes: STEP and STL look about the same
    • More complex models: STEP files can have visible issues that STLs don’t
    • Intricate designs: STEP files really struggle, showing big problems in the slicer view and final G-code

  3. File size: STEP files are usually smaller to start with but often end up bigger in the slicer

  4. When to use what:

    • Use STEP files for editing designs
    • Use STL files for the best print quality right now

Remember, slicer software will probably get better at handling STEP files over time. But for now, a good STL file is often your best bet for smooth prints.

What’s been your experience with STEP vs STL files? Have you noticed any differences in your prints?

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interesting points! have u tried both formats with super detailed models? im curious how they compare for really intricate stuff. maybe theres specific types of designs where step actually works better? what do u think about future slicer updates improving step handling?

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i’ve had mixed results with step files. they often go awry in slicers. stl files are usually smoother for printing, so i lean on them for complex designs. step is great for editing tho. what are your thoughts?