Exporting GLB and GLTF

Questions
1

Sometimes I found the Export GLB and GLTF is not working (no output). I wonder if there is any error with the scene. Because I could export and publish without issue.

Is there a way to trouble shoot this?

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2

Are you talking about the glTF Blender Exporter? If you have problems with the export, i would recommend to open an issue at github:

3

No, it is more like some imported OBJ cannot export into GLTF or GLB. All I did was to import the OBJ, and try to export, and nothing being exported. I am not sure what the issue is exactly. Is there a debugger message somewhere?

I found that KhronosGroup GLB is not fully compatible with FB 3D, however ThreeJS GLB is much more compatible, which is interesting.

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4

I have a feeling it is how the OBJ got exported (multiple materials, multiple UV, combined). The funny thing is when GLB and GLTF export failed, I tried exporting the OBJ and import back the OBJ, then GLB and GLTF works, but the OBJ is unsmoothed.

5

Alright, I think I found out why… it is the OBJ export option in Blender that I need to tweak so that the OBJ is not all combined into one. All good!

6

Okay. Just to be clear, you’ve talked about the glTF- export in the editor, right? :wink:

7

That is correct.

The export does nothing when the OBJ is bad. In Blender - when exporting OBJ for ThreeJS, “Material Group” must be checked. OBJ workflow seems to be cleanest except for one thing: JPG or PNG image dimension is affecting the size of GLB. Sometimes in a weird way. Maybe the GLB packer compression can be improved.

8

May be worth trying obj2gltf. There are some issues we’re still working out with THREE.GLTFExporter to create strictly correct glTF files.

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