Trapcode Horizon is an Adobe After Effects plugin that can create infinite, 3D mapped, backgrounds.

The Trapcode Horizon plug-in is a camera-aware image mapping tool that ties your After Effects camera to a 3D world.

By applying images or gradients to the inside of a giant sphere, Trapcode Horizon creates an infinite background. No matter where your camera is directed, the simple controls make photorealistic backgrounds or sky gradients a snap.