first time trying 3d stuff and wanted to just kind of mess around and have no clue what this is nor how to fix it. there’s also this white and blue material that weirdly shows where the black is so I have no clue what this could mean
I have the impression, that the blue and white are vertex colors in the mesh. What do you mean by
Where is there? Is it an additional material included in the FBX?
Check in the material, is there “Vertex Color” → “Use as Albedo” activated?
Or is it a texture?
Ah, you switched it OFF, that explains the result.
In a mesh you can optional define a color for every vertex. Looks like Sketchfab uses these vertex color for something like faked Ambient Occlusion, or it has something to do with the skeleton, it looks a little bit like the areas where the bones are connected (weight of the bones). I can’t find any settings in Sketchfab to preview these vertex colors in this model. I have no idea why they are set and what for.
You can use vertex colors for different effects, e.g. like blending in a shader, or for faked lighting etc.
Could you mark the correct response as the solution that fixed it, please. That will close this thread, instead of [FIXED] in the title.