Watch as the Viceroy is talking to Darth Sideous on the hologram projector, at the point where he introduces Darth Maul. Darth Maul stands with his arms folded, unmoving, when he comes into view, but his face is clearly visible despite his hood being up. When the camera shows a close up of Darth Maul, the hood hides the right side of his head (look on the left side of the screen, b/c he is facing you). Then, the camera goes back to the original view of he and Darth Sideous, and the hood is back in its original position, leaving his face exposed clearly. I know this is a small error.