2D & 3D layers

This movie shows usage of MPEG-4 layers. The scene is composed of three 3D layers, each with their own navigation information. The first layer also shows that a 3D layer is considered as a 0-depth object in MPEG-4, and is composed with the other objects using the painter’s algorithm. Also not the usage of backgrounds in the scene, especially the alpha background of the second layer allowing see-through of the main scene movie background.