Some digital compositing systems support a strictly two-dimensional workflow. Nuke products, by contrast, offer a robust 3D workspace that lets you create and render complex scenes composed of polygonal models, cards (planes textured with images), cameras, lights, and textures.
This 3D workspace has countless uses, the simplest of which is generating pan-and-tile scenes. These are scenes with 2D image planes arranged into a curved shape, and then rendered out through an animated camera to give the illusion of a seamless environment.
Simple pan-and-tile scene.
The 3D Compositing chapter in the Nuke User Guide explains how to make full use of Nuke’s 3D workspace.