Support normal maps

[xentripetal]

It would be amazing if there was a way to use normal maps for sprites and atlas sprites

[ryanpeach]

So I have a strong use case for this.

I have a lot of "spheres" in my game and I want the light bouncing off of them to look like a ball not like a hard cutoff.

Any way to do this right now?

[NicTanghe]

it whould be weird if this wasn't implemented.
I might have a look at it if the stars alighn. it shouldn't be that hard to do.