Terrain.png



 terrain.png  was a texture atlas found inside minecraft.jar. It was used to store the game's block and fluid textures, the block breaking animation, and some items.

Format
terrain.png is a fixed-width 256×256-pixel file that is split into different 16×16 squares which correspond to the texture of each block found in-game.

Usage
Before the introduction of texture packs, terrain.png had to be edited in order to change any textures found in-game. The file would have to be placed inside an edited minecraft.jar file in order to work.

Empty regions
Unused sections of the texture are occupied by lilac squares, similar to the missing texture block found in later versions. The paintings sheet also used this purple texture, however other atlases, like items.png and particles.png, did not.

If a block attempted to use textures from the unused, magenta-colored parts of the file, the block would be colored magenta:. Examples of vanilla blocks that drew from such parts of the texture at one point or another are the locked chest, several extreme values of wheat, and an overeaten cake iteration.