Definitions

1. noun

A visual effect appearing in photographs or films caused by the interference of light as it passes through the atmosphere at varying temperatures, often producing a wavy or distorted pattern.

“The film’s cinematographer struggled to capture the perfect shot because of the distracting schlieren that appeared in the background.”

2. verb

To produce or create schlieren in a photograph or film.

“The photographer tried to schlieren the image to make the effect more dramatic.”