Rheneas Viaduct (T&F)/Behind the Scenes

Background Information
Rheneas Viaduct is a fictional bridge near Rheneas on the Island of Sodor created by the Rev. W. Awdry.

Rheneas Viaduct first appeared in the fourth series episode Granpuff, which first aired in 1995. Its last appearance was in the eighteenth series episode Duncan the Humbug, which was released in 2014.

O gauge model (Small scale)
Rheneas Viaduct was originally built for the fourth series of the television series. According to concept art by Robert Gauld-Galliers, the viaduct's model is 4 ft in height and 8 ft in width. The model doubled as a set for the Mid Sodor Railway. This version of the viaduct was last seen in the fifth series episode Rusty and the Boulder.

O gauge model (Large scale)
For ease of filming and reliability, the fifth series introduced larger-scale versions of the narrow gauge engines. To go along with them, a large scale version of the viaduct was built in the sixth series. The larger-scale models were built to a larger scale than the gauge 1 engines and ran on O gauge track. They were close to 16mm scale but slightly larger.

CGI model
In 2009, the series introduced Computer-Generated Imagery (CGI) as a replacement for the show's long-standing live-action models. For the eighteenth series episode Duncan the Humbug, a matte painting of the viaduct was created, with Duncan's CGI model superimposed onto the picture.