Why is the solution for the final Keep puzzle incorrect

the-witness

I tried solving the puzzle at the Keep overlooking the glass walking maze area, and I came up with a solution that appears to satisfy all of the constraints:

Keep puzzle solution

The game doesn't accept it though. What am I doing wrong? What is the actual solution?

Best Answer

You mirrored one of the tilted tetromino pieces in the bottom left. You can only rotate them:

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Here's a correct solution (you were close!)

enter image description here The 'L' shaped piece should match the light blue 'L' shaped piece as shown in the previously completed puzzles behind the panel.

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