How does Nick now perceive Gatsby's house? What is the atmosphere

Big and empty.....

From the text:

"His house had never seemed so enormous to me as it did that night when we hunted through the great rooms for cigarettes. We pushed aside curtains that were like pavilions, and felt over innumerable feet of dark wall for electric light switches — once I tumbled with a sort of splash upon the keys of a ghostly piano. There was an inexplicable amount of dust everywhere, and the rooms were musty, as though they hadn’t been aired for many days. I found the humidor on an unfamiliar table, with two stale, dry cigarettes inside. Throwing open the French windows of the drawing-room, we sat smoking out into the darkness."