Red Gallery logic????

[Lovely_GingerTea]

I can't understand how to solve this puzzle with red and white cubes in the gallery. I read a lot of guides on explanations, but they all talk nonsense: someone writes that if you are not reflected in the cube, then this cube is not part of the symbol (and the heroine is reflected in all the cubes without exception, who made it up?), someone writes that it's all about the signs. But in the signs is written only the order of the symbols and some tension about the ‘truth’. How to understand the symbols themselves? I'm stuck, went through the whole game easily, and here I just break my head. Help please and do not say riddles like ‘and you have already read the signs? and you have already been there and there and there?’. - I've been everywhere and read everything. Just explain it to me in a human way, please.

[Tomas Mac Mordain]

For each room, make a 3x3 grid on paper.
For each white square: (or each red, you'll get the inverse picture then):
- move the heroine on the floor such that she is reflected in the white square
- fill the grid item the heroine is standing on (on the ground) in your 3x3 grid on paper

Do that for each room. Each room will then give you a tetris-style block shape. You'll need those tetris style blocks to solve a puzzle down the line. There's nothing you need to interact with in the gallery itself.

[Sammun Mak]

And yes, you're right that the signs are just about the order rather than anything else.