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Dove down a rabbit hole.
While trying to get the positioning correct for the parallax background, I noticed that it was basically impossible to avoid some overlap. Seemed like some subpixel issues. This led me to start looking into the random 1 pixel lines that would sometimes appear while scrolling by the tilemap. It’s most noticeable in the trees but once I started looking, it was EVERYWHERE.
I messed around with adding padding to some of the tiles. I created the tree as a single image rather than it being made up of tiles. I made sure everything was being drawn with integers for positions rather than floats. Finally, FINALLY, I tracked it down to the scale mode on the SKScene that contains everything. I had messed around with this before, attempting to make it look decent on iPad so I could have Universal easily. I switched it from AspectFill to ResizeFill and *poof* the flickering lines were gone. Of course, this means it doesn’t scale well to iPad, but I’m going to push on and focus on iPhone and look at a solution for iPad later. During this debugging process, I did introduce a way to override everything’s display position so I’m thinking I can do some scaling there and all will be fine.
tl;dr – Found and fixed root level issue. Back to fun things.
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