Minecraft wiki entry for Animation_placeholder_texture, associated text: Due to the first terrain.png in Pocket Edition being based off of the terrain.png from Beta 1.3, both the still and flowing water texture placeholders from said version are there by default. It was used as the water texture on certain devices, seemingly on either very new or very old devices relative to 2011-12. It seems that as of v0.7.0 alpha, the generated water texture would always be used, and the placeholder texture's use in later versions is unknown.