The quality of the terrain visuals then largely depend on the texture size used. It is based on projecting a simple textured sphere representing Earth into the scene using ray optics. In particular for orbiting spacecraft such as Vostok-1 or the Space Shuttle or even the UFO, neither rendering nor loading the standard terrain mesh is fast enough.Įarthview is an alternative orbital rendering engine for FlightGear designed to get credible visuals in these situations. While it is possible to use it for altitudes up to some 100 km, the performance impact becomes increasingly prohibitive and the visuals are not overly compelling.
The default FlightGear terrain rendering strategy is designed for visuals from aircraft cruise altitude.
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