Texture renders black on some objects

Questions
1

Hi everybody,
I’m learning Three.js and for exercise I was trying to animate some random models.
I had a working gltf model.
I then modified it in Blender (modified faces, and unwrapped to set texture back).
The model looks ok both in Blender and on gltf viewer.
But when I load it in my code, some modified objects display black, while one of them is ok.

image
image282×517 62.2 KB

The fact gltf viewer displays correctly suggest an error in my code, but the the problem rose only after I modified with blender.
Here is the gltf file scene.gltf (240.8 KB)
‘Pending_rope_001’ node is ok, other ‘Pending_rope_xyz’ nodes don’t (in picture ‘Pending_rope_001’ next to ‘Pending_rope_002’)

2

Please share the complete glTF asset and not just the JSON manifest. Also consider to export to glb since all components of the asset are in a single file.

3

I get an error whenever I try to upload the folder with assets, even if zipped.
I’ve uploaded a sample of the project on github

4

I’ve downloaded the asset and imported it into the editor. After adding an ambient and directional light, it looks like so:

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image1287×854 76.6 KB

I can’t see the mentioned black objects. The asset looks good. Please try it with a similar lighting setup.

1 Like
5

Yeah it kinda solves the problem, although I can still see some black signs on the ropes. I added a second directional light on the back of the model to smooth them.
But what I really can’t understand is what has changed.
I updated the github project, adding both the current model (with 2 directional lights) and the original one. The original one did not have any directional light and nonetheless it was ok. After I made the loop cuts it changed. I hope this is visible in the updated project