Small brick-lined tunnel example.
This tunnel is used for the passage of people under a rail track in Wollongong Australia. GeoInteractive often use this tunnel to test their proprietry 3D mapping systems.
It should be noted that the purpose of this mapping was not for aesthetics but for geometric mapping. The quality of the photo texture is of low quality. The geometric shape is an accurate representation of the tunnel. The time it took to map the tunnel was approximately 20-30 seconds.