Minecraft wiki entry for Historical_effects, associated text: From Alpha v1.0.1 through Beta 1.4_01 inclusive, vertically travelling redstone would also appear stretched. From Beta 1.5 through to Beta 1.7.3 inclusive, it no longer appeared stretched, but still appeared disconnected from its supporting block as described previously. As vertically travelling redstone can only have a line appearance, it would not be able to appear stretched before 16,777,216 blocks, as it would already be taking up the full block face area and no precision would be able to be lost.