Why lines seen in Texture Paint When im painting im getting some gray lines on the paint. 



When i fill the color i dont get any lines

But when i paint with color with the brush i get those lines.



How to clean those gray color lines. Any suggestion. Thanks
This issue is caused due to the UV edges touching both the black background and the green paint
It also helps when you use a mipmap as the resolution decreases.

To fix this you need to draw a bit over the UV border. This creates something like a padding. 

Another way would be to match the background and the colored areas as close as possible.

Additionally a clean UV unwrap would also help a lot as it reduces the ammount of these edge areas.