Why Babylonjs smooth automatically my mesh

[Xetar]

Hello everyone, I have little issue with my mesh :

When i load it, it get "auto smoothed", and also get "cutted" apart.

Basically when I save my mesh in blender it looks like this :

But when I load it with babylonjs

 

Please help me to fix this, Thank you !

[aWeirdo]

Hi @Xetar 
Try Mesh.convertToFlatShadedMesh();
If it doesn't resolve it, do you mind sharing your .bablylon to help debugging it? 
You can PM it if you don't want to make it publicly available.

[adam]

You can also use the "Flat Shade Entire Scene" option in the Blender Exporter:

http://doc.babylonjs.com/resources/blender

The faces that aren't showing might be due to face normals pointing inward. 

[V!nc3r]

In Blender, consider to always use smooth shading mode on your object, and play with autosmooth params in your mesh. As for the Blender exporter, you can check the flat option like adam said, or activate an edge split modifier on your meshes too (no need to apply it).

You can read this to better understand why 1 vertex in Blender can finally be 2 or more when import in a realtime engine.

[JCPalmer]

The exporter dropped actually flat shading by itself in version 5.6.  Adding a split edged modifier is an actual Blender feature, plus it generated meshes with less vertices than the exporter.  You can still convert to flatshaded. 

If you still have parts of the mesh which do not show, that is probably not completely related.  Sounds like a normals problem though.  Perhaps recomputing normals in edit mode.

[V!nc3r]

About the normals, JCPalmer probably spot the issue. To avoid doing wrong things with normals during modeling in Blender, I highly suggest you to always have checked Backface culling in your 3D View shading.