The room I'm in can be accessed from the main warp gate. It is between the main warp gate room and the Broken Achway. After you lower the water there's a door down the bottom of the main structure. Once inside there's just a very short structure with two torches on either side of the door. When on top of the purple structure I swiched to 1st Person view and observed a yellow floor with red lines making a sort of figure of 8. Would someone please help me with the secret in this room.