Taiji - Gallery

This is the last main section of puzzles you'll have to solve. So remember what you've learned in the first eight sections of the game.

In the basement, take a good look around the area. The solution to these puzzles are much closer than you think.

The first floor consists of an art gallery. Look closely and you'll be able to see the various puzzle elements in each painting. Use those to solve the puzzles next to each of them.

Up in the second floor is a series of dot and line graphs. You'll need to disambiguate which direction the line is going in the puzzle. White for up, black for down. If you're having trouble solving the more trickier puzzles, try looking at the dot graph from a different perspective.
In addition, there is a painting based off of the Piet Mondrian. Look at the coloured squares to help solve the three puzzles in the hallway.

For the third and final floor, you must separate the light from the dark panels from a series of folding screens. These screens will try to throw you off as you progress through them. So take your time when figuring out which individual panel is light or dark.

There is a diorama of the mansion on the ground level that'll track your progress. Each floor that is lit means all the puzzles there have been completed. Once all four floors are lit, the fire outside will light, finishing the gallery section.