Textured patterns.

ob·ses·sion
n.

1. Compulsive preoccupation with a fixed idea or an unwanted feeling or emotion, often accompanied by symptoms of anxiety.
2. A compulsive, often unreasonable idea or emotion.

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Unwanted? The very opposite actually.
Unreasonable? Depends. It's only ~$200 / square foot... times 48 square feet...

Tarnation!