Description that appeals to the senses (what is seen, heard, smelled, tasted, or touched) and makes the reader perceive the scene, not merely understand it.
In Quincas Borba
The night was clear; I stayed about an hour between the sea and your house
"The night was clear" and the young man "between the sea and your house" form a visual picture so sharp that Sofia sees it again the next morning and cannot erase it.
Chapters LXVIII to LXXVI: The Ball, Society, and the Declaration, Carlos Maria