Question Making 2d i.e. Texture LOD

I have seen 2d LODs or texture LOD in other games, for example on trees. If you go too far away from tree or grass it turns to 2d LOD or Texture LOD, idk how to say it correctly. So I can make like plane with texture and this will be my LOD but it will not look at me. So how do I need to make it in proper way ?

 

What you are looking for is "camera facing billboards". There are shaders you can find online for Unity to do this.

 

Oh thanks!