Minecraft wiki entry for Unused_textures, associated text: In Beta 1.4, two blue particles were added to particles.png of completely unknown use. They visually resemble water droplets, possibly implying early plans to add the water dripping event later added in 1.0.0, or a change to existing water splash effects. These particle textures were eventually removed in 19w06a due to the splitting of particles.png into its constituent textures, with unused particle textures being removed outright.