The end rod texture contains unused pixels, even though MC-201150 removed some. The 4 bottom pixels of the base of the end rod are the unused ones. The "end_rod_unused_pixels.png" attachment shows the unused pixels (the ones inside a red frame), while the "end_rod_used_pixels.png" attachment is a screenshot of a 3D editor showing the pixels used for the base of the end rod. The base uses a 4x4 square (semi-highlighted part in "end_rod_used_pixels.png") for the the Up and Down sides and a 4x1 rectangle (highlighted part in "end_rod_used_pixels.png") for the North, South, East and West sides, but the remaining 4 pixels under the shapes mentioned above are not applied to any surfaces.