In this photo taken late Thursday, May 7, 2015, a prison guard, left, and seated inmates cast shadows on a wall while waiting for the beginning of a rock concert by Romanian band Pro Musica, inside the Popa Sapca jail in Timisoara, western Romania. (Photo by Adi Piclisan/AP Photo)

Russia's Ekaterina Birlova casts a shadow on the sand as she serves to Poland during a women's beach volleyball match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Tuesday, August 9, 2016. (Photo by Marcio Jose Sanchez/AP Photo)

Long shadows are cast by players as Mitch Wallis of the Bulldogs passes the ball during the 2016 AFL Round 08 match between the Melbourne Demons and the Western Bulldogs at the Melbourne Cricket Ground, Melbourne on May 15, 2016. (Photo by Scott Barbour/AFL Media/Getty Images)

Storks casts shadows as they search for food on the dried-up Lake May in southwest Turkey on October 30, 2021. (Photo by Seyit Konyal/Solent News)

A staff carries a flower bouquet for a winner during the award ceremony at the 19th Asian Games at Ningbo Xiangshan Sailing Center in Ningbo, China, Wednesday, September 27, 2023. (Photo by Eugene Hoshiko/AP Photo)

An armed tribesman loyal to Houthis steps on a US flag during an anti-USA and anti-Israel rally, in Sana'a, Yemen, 29 January 2024. (Photo by Yahya Arhab/EPA/EFE)

In this photo taken on Tuesday, December 20, 2016, dancers of the U.S. company “Catapult” create a group of ostriches, during their show “Magic Shadows”, in Milan, Italy. Dancers in the company create shadow sculptures with their bodies, giving a contemporary twist to the ancient Chinese art of shadow theaters. (Photo by Luca Bruno/AP Photo)

Shadow art is a unique form of sculptural art where the 2D shadows cast by a 3D sculpture are essential for the artistic effect.