Tiling sprite and spritesheet

[pdiddles03]

Has anybody ever run into an issue where if they use a tiling sprite and use  spritesheet image as a texture, they get a very fine 1px line between the repeat? is there a way to fix this?

[Mickety]

Haven't used that yet but a screenshot would be interesting to take a look at

[AndreasLoew]

To fix this you have to do 2 things

1) Make sure that you use rounded coordinates. E.g. make sure to use x=12 and not x=12.45 
2) Add 1 pixel border around your sprites that repeat the pixel colors for the borders.

This additional pixel line must not be part of the sprite - it's outside on the sprite sheet.

The reason for this is the following: OpenGL based renderers might drag in transparency from the sprite's neighbor pixels. The result is a thin line of transparency - the artifact you are talking about.

You can use TexturePacker for this - it automatically extrudes your sprites for you. No manual work required.