I am new to Unity. I'm trying it out and using Futile for a code-first approach, but still importing textures using the Unity system.
The problem I'm having is that when I use mip maps to scale large sprites down to smaller sizes without jagged edges, I'm getting a black line artefact above said sprites.
A little hard to see, but they're there. If I turn down the resolution, you can clearly see them:
These are my texture settings:
My question is, why are these black lines here? Is it a mistake I've made? Is it just a common side effect? How can I reduce these? Also, if this is the wrong approach, how can I use smooth sprites in a game with the ability for them to scale up smoothly?