Minecraft wiki entry for Resource_Pack, associated text: Textures from assets/minecraft/textures/misc support a .mcmeta file in JSON format containing additional effects to apply to the texture. The file is contained in the same directory as the texture, and has the same name as the texture, except appended with .mcmeta. For example, the file pumpkinblur.png can have a properties file called pumpkinblur.png.mcmeta