Resolved Far away grid textures very jittery

Here is a video of the problem which kinda explains itself:

for context, I am trying to create a infinite plain with this gridlike texture on it, but the far textures of this grid is inexcusably jittery. What can I do about it? For the grid I am using a free grid shader from assetstore.

 

Rising the anisotropic filtering level on the texture may help, but what you’re seeing here is a classic moire effect for the texture pattern that you’re using.
It may be impossible to solve it completely.

 

Okay so this seems true so far. But I have found an acceptable solution.
1. Turned aniso level down to zero in the texture, even though this solved the jitter, the far texture looked really bad, sort of like very bad compression on videos.
2. Set filter mode to trilinear, which solved the bad compression type look.

The end result is okay, texture lost the crispy look but the jitter is gone for the most part.

 

Jitter is when pixels hop around rather than the moire (shimmering) effect that you have here.

A further explanation from https://bgolus.medium.com/sharper-mipmapping-using-shader-based-supersampling-ed7aadb47bec

But in general, nobody needs a free grid asset. It's just a plane with a grid texture on it. If you wanted to improve it beyond that you could.