On the Final Destination stage in Super Smash Bros Brawl (and SSB Melee) the players fight on a platform seemingly moving through space:
I see particle effects, but I don't understand how they made the clouds or the rest of it. I'm currently working on a breakout-clone in Unity3D, and would like to create a similar background for my game.
How can this effect be produced? How can a texture be made to fly towards the camera endlessly / seamlessly like that?