Here's a very useful background that can become the outside background of Rusty Ruin Zone Act 2. Spring Stadium Zone Act 1 can also use it as well but only the water and sky parts would be there while the mountains and waterfalls are just in Rusty Ruin Zone Act 2. You don't have to use the mountain with the Eggman face by the way. It's free to use. You just have to give credit to the creator. That's all. Link: Sunset Background Construction by DelayArtWorks on DeviantArt