Despite their simplicity, they are rarely built by beginners but are usually light relief for an experienced modeller.
This combines the narrow physical gauge needed with a larger and more visible scale.
Narrow-gauge prototypes also have short wheelbases, slow running speeds and so are often more accepting of tight curve radii.
[12] Scenery may be realistic, a caricature of geography containing real buildings or deliberately unrealistic.
[13] The difficulty is the likelihood that all of the layout can be seen at once, and the problem of finding any sort of visual break between the two sides.
A popular approach is to place a large visual break in the centre of the layout, such as a hill or quarry working.
This has the advantage of stopping the layout look so obviously a loop, but at the risk of looking like a wedding cake with an arbitrary hill in the middle.