I just had a issue with black meshs and I found one solution or I guess one reason that it happens.
In Blender if you have a lots of materials and you export the model the mesh becomes Black and you can’t change it, this mostly happens with .fbx files not .obj lots of people say to just export as .obj but that groups all your objects so not that helpful.
The Issue see you cant even change the color of the mesh its broken or add textures to it.
The fix, as you see I have lots of materials here in the object so when I exported it the mesh become black and after I removed them all and reexported the mesh the Black Mesh issue stopped hope this helps some people in the future.
To further expand on the “attribute” part, particularly for people using vertex colours:
I’ve found that if I copy a mesh with vertex colours from one blend file into another, or combine two meshes which both have vertex colours, some meshes will be given two colour attributes, one of which turns the mesh completely black. You sometimes won’t even notice that this black attribute exists while vertex colouring since you will have the non-black attribute selected.
Like this post says, all you need to do is remove the broken attribute by pressing the ’ - ’ icon.
