Bug Bad interpolation in tilemaps?

I've got what appears to be an interpolation issue on tile maps. In order to illustrate it, I've done a minimal 2D URP Unity project (650 MiB).

First, I've created a tileset of 9 64×64 tiles, with a white tile in the center and colored neighbours, with "point" filtering mode:

Tilemap​

Then, I've created a tilemap made of white tiles only.

However, vertical fushia and horizontal blue lines appear in both game window:

Horizontal blue line and vertical fushia line in game window​

as well as in the scene window (zoom in):

Horizontal blue line in scene window​

Vertical fushia line in scene window​

It happens in both 2021.3.17f and 2022.2.8f1 Unity versions, in both this minimal project and my game project.

What did I make wrong? Is this a bug?

How to get rid of these lines?

 

create sprite atlas with padding = 2

 

Do you mean change all the graphics of the game in order to include a 2 pixel wide padding between every tile in the tileset, then redo all the tilemaps of every level?

 

If you use the unity builtin sprite atlas functionality you don't have to redo anything. All the references to sprites will remain correct. Unity will automatically detect that a sprite is in an atlas take image data from there. This is very convenient for adding little bit of extra padding or optimizing the memory usage without having to make any changes in original assets or workflow.

 

i do mean that. If you want to do it manually, that works, but there is a feature tho that can do it automatically for you, up to you

 

Using a Sprite Atlas appear the solve the issue, at least in the game.

Thank you all!