New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Sharp Edges Ignored #73

SurlyBird opened this Issue Nov 8, 2018 · 1 comment


None yet
4 participants

SurlyBird commented Nov 8, 2018

Exporter ignores manually-assigned hard/sharp edges in Blender 2.8, resulting in an 'all-soft' mesh.

Repro in Blender 2.80 Experimental with glTF-Blender-IO:

  1. Create a cube
  2. Display>Shading>Smooth Edges
  3. In Edit mode, select all edges. Edge>Edge Data>Mark Sharp
  4. Select the Object Data tab, Turn on Auto Smooth and set the angle to 180.
  5. Edges of cube should appear hard/sharp in the viewport.
  6. With cube selected File>Export glTF 2.0 (glb). Make sure Export normals and Export Tangents are checked.
  7. Write file to disk.
  8. Load file in
  9. Hard edges will not be preserved.

Contrast the same workflow with Blender 2.79 using glTF-Blender-Exporter: Hard edges are preserved in .glb written to disk.

Note: In 2.80, setting Display>Shading>Flat faces does export a .glb with hard edges, but all edges are hard. What we want is the ability to define custom hard/soft edges on any given mesh (like we can do in Blender 2.79 with the glTF-Blender-Exporter addon).

Example files attached.

@UX3D-nopper UX3D-nopper added this to the Community milestone Dec 2, 2018


This comment has been minimized.


julienduroure commented Dec 3, 2018

Note that an issue has been opened in regarding sharp edges management:

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment