Unintended lines on mesh

[junior516 (Exe)]

This issue has been making me go crazy. There are weird lines that appear on my mesh which are more visible the more you zoom out.

This is how I mapped my mesh. (Smart UV Project 66 angle limit 0.1 island margin 0 area weight)
Using the texture on a separate mesh and zooming far causes this to happen.
This problem is even more pronounced in roblox studio. (and the teeth has black lines as well)

I don’t know if it’s a problem with the texturing or how the mesh is made, but I have been trying to fix it for hours and it has been very annoying. I’ve tried scaling the uv map but that didn’t work, as well as removing doubles.

[VegetationBush (FartedWayTooHard)]

This is because Roblox compresses the images so if a face in the black section is close to a white section it might overlap because of compression. I’d recommend separating the parts that will have different colours by resizing everything down.

[junior516 (Exe)]

Thanks!