Minecraft wiki entry for Placeholder_texture, associated text: 1 Missing texture
2 Animation placeholder textures
3 Texture atlas blank spaces
3.1 Uses
3.2 History
3.2.1 Blocks
3.2.2 Items
3.2.3 Particles
3.2.4 Paintings
3.2.5 Effects
3.2.6 Map icons
3.2.7 Unsorted
4 Default texture
4.1 Uses
4.2 History
5 Bedrock Edition missing textures