What was the title of the 2006 Pixar short film featuring Mater from Cars?

The 2006 Pixar short film featuring Mater was titled Mater and the Ghostlight.

Mater and the Ghostlight was released as a short connected with Cars. Its story follows the residents of Radiator Springs as they play a prank on Mater, who has been telling exaggerated tales and frightening others. The prank centers on a mysterious blue light known as the ghostlight, creating a brief supernatural-style adventure within the otherwise comic Cars setting.

The short expands Mater’s personality beyond his role in the feature film. It uses the town’s familiar characters and nighttime setting while presenting a self-contained story about teasing, storytelling, and consequences. Its title is often remembered alongside the Cars short films that later became associated with Mater’s independent adventures.

Mater and the Ghostlight is not the same as Rescue Squad Mater, Tokyo Mater, or Heavy Metal Mater. Those titles belong to the Mater’s Tall Tales series, which was produced later. The ghostlight short is specifically associated with the original Cars era and was released in 2006.