[SOLVED] Need help with tiles being drawn improperly

[The-Train]

Note: I recently posted this same thread in the general help forum and I now added it here as I think this is a more relevant category for it. Sorry if this constitutes spam.

Recently I ran into this strange issue while using tiles that seemed to be drawing vertical lines between the seams of my tiles in a seemingly random way.

As you can see the tiles are really obvious looking wrong. After further inspection I found out this issue appeared to only be present in the game window as the tiles looked proper in the scene window.

A more in-depth search though made me realize that the issue even persisted in scene window as well.
Shown below is a picture where zooming in showed a incredibly tiny portion of the sprite had the same vertical lines.

The vertical patterns that are generating across my tiles seem to be coming from their adjacent tiles in their tile map. The tile map is entirely horizontal with 16 columns and 1 row so I think that’s why the weird patterns are only vertical. Each tile is 20px by 20px and I confirmed that the problem is not with how I sliced the tile map so it’s not how I actually made the tile map (as far as I can tell). Also the section I zoomed in on was so close that is was far less than one pixel of the tile and I think it is being blown up on the game window because of how it’s color is just barely being sampled by unity’s camera in some way (that’s my best guess).

Either way I’m having one hell of a time trying to figure out what the issue is or how to solve it. I’ve google searched for a couple hours now and haven’t found a lick of anyone with the same issue so I’m now resorting to actually making my own forum post for the first time ever. Hopefully you guys might be able help me resolve this issue. (Note this occurs with both default tiles and the unity made rule tiles)

Thanks in advance.

[eses]

@The-Train

To me it seems you just have texture bleeding from neighbor tile in tile sheet.

Try adding several pixels of padding around your tiles, try disabling mipmapping from your textures, check that your texture import settings match the texture size and check the filtering mode of texture for starters.

I wrote an answer to similar question a while ago;

Tilemap seams and tearing (fix that works for me)

@ There are several reasons for “seams” in Tilemaps. I’m not too technical so sorry for some inaccuracies. Unity is a 3D engine, and Tilemap is created from a 3D mesh, and a tile is created from a face consisting of 2 triangles. You can see this with shaded wireframe Scene view mode. This quad is mapped with UV coordinates that are used to render the textures to tiles, so the same rules apply as to any GPU rendered textured meshes. Pixel padding - you will have to have enough pixel padding ar…

[The-Train]

@eses

@The-Train

To me it seems you just have texture bleeding from neighbor tile in tile sheet.

Try adding several pixels of padding around your tiles, try disabling mipmapping from your textures, check that your texture import settings match the texture size and check the filtering mode of texture for starters.

I wrote an answer to similar question a while ago;

https://discussions.unity.com/t/769290/2

Thank you so much for the help! I had no clue that was how Unity handled tile sets and drawing. I gave my sprites the padding and it solved the issue.