Procedural texturing does not use a pre-defined texture, but computes the texture as part of the rendering process. In the default rendering scheme, the terrain of a certain landclass is painted with a pre-defined texture, then the light is computed and this is what we see on the screen. Procedural texturing is an even more powerful technique. Regional texturing allows to define texturing schemes for specified geographical regions and allow to overcome these problems – European cities can now defined to look different from US cities. Up to 2.8, these texture definitions were the same all over the world, Yet in reality, this is not true – cities in the US for instance tend to be organized in rectangular grid patterns which are completely uncommon in Europe, Irrigated crops in Asia are most likely rice terraces, whereas rice terraces are not a common sight in the US Mid-West. Instead, the terrain is described in terms of landclasses, and each landclass has an associated texture. Short of addons such as fgphotoscenery, Flightgear has never used aerial photographs for texturing. Yet, with regional texturing in Flightgear 2.8 and easy to configure procedural texturing in the current development version 2.9, two techniques have arrived which have the potential to rapidly change this.
It’s perhaps not a big secret that the default Flightgear World Scenery does not look stunning everywhere in the world. Author: Thorsten Renk Regional and procedural texturing
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