What were 2D and 3D?

The 2D and 3D were concepts used in virtual worlds such as anime and games to describe the characters, scenes, and storylines in the virtual world. Two-dimensional refers to the two-dimensional world on flat media, which is usually composed of two planes. People and objects are projected on the plane without a three-dimensional structure. The characters in the 2D world usually had unique appearances and personalities that could be expressed through drawing, manga, animation, games, and so on. The three-dimensional world refers to the real world. It is the three-dimensional world that we live in. It has a specific appearance, behavior, and structure. In the three-dimensional world, characters usually had a complete three-dimensional structure to show more realistic characters and actions. Although there was no direct connection between the 2D and 3D, there were many intersections and interactions between the 2D and 3D cultures. Two-dimensional works could be regarded as a cultural phenomenon, and three-dimensional works could also attract the attention and appreciation of two-dimensional enthusiasts.