Paper2D sliced background image border is visible

Hello,

I’m having a big of a problem with the background image in my 2D scroller with Paper2D. I have a rather big background image (8600 px) and when I’ve included it on my game, it said that only 8192x8192 images were supported in UE4.

I decided to slice the image and use two sprites to render the background. I positioned both sprites so there is no space between them. But when I’m playing the game, a fine line between the two images appears and disappears as I move my character.

You can see it here:

I don’t know how can I make this line not appear. I’ve tried fine-tuning both sprites positions so there is literally no space between them, making one of the two sprites bigger and putting it “behind” the other so they overlap but none of the solutions work.

Anyone knows why this happen and how can I avoid it?

Thank you!