This section contains a walkthrough for the prism puzzle found in chapter seven of Uncharted: Lost Legacy. The prism puzzle is one of the most complex puzzles in game, even if the solution isn't that tough. Follow the steps below to be able to continue the game.
The section begins once you've activated all the waterfalls next to a large statue of Shiva. An interactive area will be activated, allowing you to get to the other end of the large hall.
Make your way to the first statue (which has a prism mounted on the top) and rotate it so the sunrays will be reflected in a straight angle lighting a new statue located on your left (the rays will also be reflected of the first statue on the opposite side, but you'll take care of it later).
Proceed to the left side of the ruins (you can utilize the interactive hooks as means of fast travel). Skip the second statue for now and reach the third one (shown on screenshot 1). This statue moves in a straight line - leave it below a ceiling mirror shown on screenshot 2.
Return to the second statue and rotate it as to point the ray to the third statue (Nadine can do that for you).
By now the ray should reflect off the third statue and the mirror located on the ceiling inside the hanging cage which you've utilized when attempting to reach the sculpture of Shiva. The screenshot above shows the correct sequence:
Proceed to the final area (east from the prism) and approach the destroyed statue. Investigate it - Nadine will suggest replacing the statue by holding a mirror.
Push the mobile mirror to meet up with the one held by Nadine. The ray will be reflected from the remaining mirror, unlocking the way forward and completing the riddle.