I have problem with texturing and glithes but this problem applies to one computer on macbook a1466 is wrong and another computer is everything is OK
Can you please demonstrate the issue with a live example? It would be also helpful if you share the related 3D model.
I have the following result on my Ubuntu laptop:
The browser console reveals that you are using OBJ. What happens when you import the file into Blender or a website like https://sketchfab.com/? Do you have correct results?
But these OBJ files are ok. Example here also OBJ files: http://polidomes.com/tent/polidome-75.php
and it works very well no problem with glitches and black textures. So I think that there is problem with code.
When I upload
150.MTL at https://blackthread.io/loader/, it looks okay. This website uses