[3] Hornig's art considers the built environment and incorporates everyday architectural elements like doors, walls, and windows, as well as industrial materials such as concrete.
[3] One major site-specific work is the Glass Façade Project, or Das Glasfassaden-Projekt, which in 2005 provided a large installation for an elementary school building at Pfeuferstraße 1, in Munich's Sendling district.
[3] In certain works that incorporate architectural elements, she simplifies and omits details like door handles and adjusts an item's scale in order to transform a recognizable object into a sculpture.
[6] Her 2013 exhibition at the Tanya Bonakdar Gallery in New York, called Transparent Things, took its title from a 1972 novel by Vladimir Nabokov and explored themes of temporality and urban spaces.
The exhibition combined sculptural pieces, mimicking industrial urban objects and made out of materials like concrete, polyester, and aluminum, with photographs depicting run-down spaces in modern Berlin.
Nearly all of the photographs are captured through windows, in a manner that compresses and distorts depth perception and sense of place, throwing viewers off-balance and creating spatial confusion that is characteristic of Hornig's work.