Question Visible edges of mesh faces (only visible from far away)

So I'm pretty new to using unity and blender. After making some random assets, I noticed that some of them have these visible edges between the mesh's faces. And they are only visible from quite far away. The meshes look completely fine up-close. I tried looking around and couldn't find a proper solution. Does someone have any ideas what could be causing this?

edit:
Seems like its some sort of issue with the UV-mapping. I see the edges in blender too and started messing around with the uv-maps and managed to fix the edges on one of the meshes. But this required making the map way smaller so the edges of the map aren't anywhere near another texture on the atlas. Is there a proper fix to this or is this just an issue that comes with uv-mapping in general?

Examples below:

The middle part of the fence is made of two faces and from far you can see where the faces meet.


Edges of the faces visible at the bottom walls.