What is the secret to the burnt treasure map with the Polytron logo, the candle room, and the floating black monolith?

After lowering the water level, there is a anticube room beneath the first warp zone. In New Game+ first-person view mode, the Polytron logo shows on the floor. After following the treasure map (standing exactly in the hole of the logo, entering the tetromino code on the reverse side), a floating black monolith/obelisk/pillar appears. What is the trick?

floating black monolith


As discovered by a person on the Xbox360Achievements forum in this post, this puzzle can be solved just like the first puzzle in the same room. The following picture shows the floor of the room, which can be seen in first person view:

Room floor

The first puzzle required a button input sequence while standing on the square with no line in it (circled in blue in the picture). This puzzle similarly requires standing on the square with a line in it (circled in green in the picture) and inputting the following button sequence.

down down LT RT RT A up

Source : Link , Question Author : Wolf , Answer Author : murgatroid99

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