Minecraft wiki entry for List_of_broken_features, associated text: The table below demonstrates the historical visual behavior of entering a nether portal, with time passing going to the right. Blank spaces show where the effect does not play, an opaque nether portal texture shows when the effect is at full intensity, and a transparent nether portal texture shows where the portal animation is either accelerating or decelerating. The behavior types shown in the table are used within the following version ranges: