Sky Sculpt

The sky has a cool "flecky" look to it, which animates by itself. That's a nice painterly starting point. The gizmo actually looks like a spherical sculpt...

Which sort of makes me want to be able to pick a real sculpt and have that be used as the "skybox." Still has the flecks, we could use whatever animated effects, tinting, etc. we want. And we can increase the detail level, or animate the looseness to affect the flecks in the sky. Rotate it around to animate the clouds moving in the sky. Add a circle as the sun. Or dots of glow for stars in a night sky.

(If there's a hole in the middle, it could just be black in that spot of the sky.)

And with it using the appearance of the sculpt live, animating the sun in the sky etc. would not have streaks behind it. We could update the colour as quick as we want without needing to wait for more flecks to animate in, etc.

It would basically be flattened out and used as a texture for the sky. With all the benefits that affords us as creators.