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Using Lychee Slicer

Using Lychee Slicer

Getting started
  • Contacting our support – The information to provide
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Files Scene Import and Exports
  • Difference between LYS and LYT (lite) scene files
Faqs

Faqs

  • FAQ filament slicer
Resin and Printing settings
  • Print Time Override: get control on your printing time
  • Essential information about the CTB v4 file format
  • Printing with the Creality a Halot printer and Lychee Slicer
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Using Lychee Slicer
  • Differences between the different anti-aliasing
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Export
  • How can I check my sliced files after the export?
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Misc
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Issues

Issues

  • What is a non manifold geometry? How to fix it.
3D view and display
  • [windows] lychee run in the taskbar but doesn’t appear.
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  • Zoom not working for MAC users.
  • What is a non manifold geometry? How to fix it.
  • WebGL 2 not supported error message
  • 3D view /objects disappeared while the interface is still visible
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  • What is a non manifold geometry? How to fix it.

What is a non manifold geometry? How to fix it.

By definition, non-manifold geometry is a mesh that cannot be unfolded into a flat surface with one directed normals and can not exist in the real world.

In the case of 3D printing, a non-manifold object is a 3D model with structural issues. Some can even prevent the model from being sliced correctly and then 3D printed.

The most common issues are:

  • Overlapping faces or an inner face if more than two faces are linked to a single edge.
  • Holes in the object surface, missing faces, or non-welded edges.
  • Two or more faces share a single vertex but no face.
  • Separates shells in the same object.
  • Self-intersecting surfaces.
  • Inverted face regular (the normal is the polygon information to define what is the inside or outside direction).
  • Non-planar face.
  • And more…

Lychee Slicer will alert you if a model is non-manifold or not:

You can select a model with more information in the Layout workspace and repair it if needed.

In the object list, a non-manifold model will have a red warning next to its name. Clicking on the small arrow will give more information about the error.
 

Keep in mind that you should avoid printing a model flagged as non-manifold or in error as much as possible. Try to repair it as soon as you import it inside Lychee Slicer. 

If the automatic repair tool provided can’t fix it, you may have to repair it in a dedicated fixing software or by using 3D modeling software to edit it. Then re-import it.


One major exception is if a clean 3D model is exported with its supports from Lychee Slicer and then imported back, it can be flagged as a non-manifold when you import it back into the Slicer.

It’s a known issue. Your model and support will print fine. No need to repair them. The most common case is purchased pre-supported STL 3D model.

Zoom not working for MAC users.WebGL 2 not supported error message

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