Hi Flamealchamist. I’m guessing what you seeing is seams. First off, check your Console window in Unity for any warning or errors after you export your map. It’s possible that you may have anti-aliasing enabled.
Seams may persist in your Scene view after disabling anti-aliasing but what’s really import is how your map looks in the Game view. If there are no seams there then you’re okay.
However, under some conditions (mostly due to camera location and size) the texture sampler may pick a texel that is just out-of-bounds of your tile. In those cases I put a margin around every tile in my tileset. You can read about that technique here: https://web.archive.org/web/20160313073130/http://www.firebelly.net/post/114529965784/tile-gaps-using-unity-5-and-tiled2unity