So after watching the 2D scrolling background tutorial, I tried to implement one in my project. Watching 10 seconds of the video from here shows that the tutor changes the tiling value, and it repeats as you would expect it to.
However, when I attempt to tile it, following the same instructions, it doesn’t tile, but instead infinitely repeats the border pixels, forming a solid fill colour effect.
How can I make it so my .PNG image tiles correctly? I assume I’m missing something simple but I can’t find it for the life of me.

