For each tile in Disillusion, you must look at the orientation of the tile to place it accurately based on the rules for that orientation.

The tile will either be:

• Tall (the piece is taller than it is wide) OR
• Wide (the piece is wider than it is tall)

For tall pieces, you must place the piece next to another tile with the same color. In this case, only color matters, not symbol. The tile must match the color on all sides of any pieces that it touches. Each tile will either be red, yellow, or blue. 

For wide pieces, symbol is what matters, not color! When placing a wide piece, make sure that it matches the symbol (circle, plus sign, or diamond) of all the pieces that it touches.

When placing tiles, the orientation (tall or wide) of the piece that you're matching them to doesn't matter. The only attribute you need to pay attention to on the pieces which are already placed is color (for tall pieces) or symbol (for wide pieces).