Collection Plate
At the end of watching the video from solving Puzzle Box 2 you see at the end the words "/collectionplate". After going to http://vanishingpointgame.com/collectionplate it tells you when the time is right I will ask you a question, and also says _ out of 36 found. This refers to the White Boxes found in each puzzle. Since there are 36 boxes. That means there are 9 white boxes in each one puzzle box. After finding all 36 you return to http://vanishingpointgame.com/collectionplate and it will ask you a question that you must answer to win the meta puzzle.
Locations of the white boxes are shown below (more required):
Rabbit Trail - Right side of the mantle, near the top (sorry no picture at this time)
Mind Reader - The left picture, the top right of the frame.
