So I setup my project in construct 2 using the power of 2 rule.
My window size is 1280 x 720.
The background title texture is 1280 x 720.
The background tile and layout is 4096 x 720 (stage moves to the right).
Whether I use point or linear sampling, it doesn't change these lines.
They appear white in the editor, but in game they turn black.
I'm also noticing it with my ground texture tiles too which are like 32x32 or something.
It isn't just my computer and/or drivers either.