Hi !
I’ve recently been playing with the custom mesh creation because the extruce geometry wasn’t what I wanted… But my meshes are now comming full black with apparently no material…
https://jsfiddle.net/ajzu4khn/7/
Thanks 
Hi!
Before return geometry;, try to add this line: geometry.computeFaceNormals();
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Oh it’s working ! Thanks a lot 
But why should I do that ? Do you know ?
To get correct shading, you need normals 
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Very similar to my first question on SO 