What's the secret of the secondary owl room off of the water tower room?

Solution 1:

This room is an alternative to the "blank map" QR puzzle for those without QR readers. They both result in the same tetromino code, but if you do one, the other will count as "completed". Thus, this puzzle is optional. (The difference: the code has to be entered as if it was found in this room unless you have the blank map.)

The tetromino code is shown in two places in this room: in the S- and Z-blocks around the tower's base (loop once), and as the fezzes atop the alien drawings at the owl's feet (only visible in first-person mode).

The code:

RT RT RT LT RT RT RT LT

Solution 2:

I found it !

Use the first person view to look at the floor, where stands the owl.

There are characters with fezzes indicating LT and RT.

Solution :

RT RT RT LT RT RT RT LT