How to fix these weird lines on the tile map when i zoom out

hey so uh, im back again.

i have finished africa and the middle east for my grand strategy game and it turned out okay, until you zoom out in game.


im not sure if you can see those lines but to me there is, does anyone know how to fix it? plz help

We can and that is not something you can fix that is something you can only negate but it will be always there

Easiest way for you would be to have 2 tilemaps there
One where tiles are squares with outlines like you have here

And other tilemap beneath it where tile are full single color
And now you only change Z order of top one (with outlines) to go below one which have full colors after you zoomed out to some level
You could even do it via layers

Other thing is how you zoom out

For example you should not set zoom to 2,1 or 0,9

But anything that you can divide by 2
Like 0,8 0,6 0,4 and 1,2 1,4 … 4 4,2 4,4 and so go on

But again it will only negate effect and not get rid of it