peterg1000 wrote in Sat Jun 12, 2021 10:05 am:My thoughts were on classifying the terrain in more general terms, e.g. deciduous trees or evergreen trees, density (sparse to dense), area of applicability (boundary) etc. Classification might even be made automatic with some clever analysis software (which I'm sure must exist somewhere).
There is classification data from CORINE or NLCD etc. but these usually don't cover tree densities, but they do cover scrubland and other land classes as well as different tree types.
https://land.copernicus.eu/user-corner/ ... lines/html Europe has higher resolution/quality landcover and terrain than the USA currently (except for custom scenries) in current old WS2 terrain.
Tree/bush density is set by regional definitions, and FG can vary tree density by creating procedural clearings, as well as thin out trees on slopes etc. See
https://sourceforge.net/p/flightgear/fg ... .materialspeterg1000 wrote in Sat Jun 12, 2021 10:05 am:Maybe I am suggesting re-inventing the wheel here, but my thoughts were prompted by flying over an area I know intimately from my gliding days ( some fields rather too intimately!!) and found much of it unrecogniseable from 2000ft.
It's likely this area just doesn't have detailed regional definitions (and maybe textures) to drive procedural texturing: The quick update section has a list of areas with developed terrain:
https://wiki.flightgear.org/Suggested_custom_scenery lists
FG will generate agriculture land patches, trees lining fields, and different types of forest, but the exact fields will not be in the same orientation - procedural texturing can look like this
https://i.imgur.com/pqTa1U6.jpeg for an area that looks like this
https://i.imgur.com/OrXK423.jpeg . Photoscenery at very high resolution can do fields but are very blurry, have incorrect colours/season, and the trees lining fields won't line up -
https://i.imgur.com/1Jp2tJg.jpeg FlightGear looks like this at high-ish settings in areas that have regional definitions that use recent engine features and accompanying textures (2 pages) :
https://wiki.flightgear.org/Category:Sc ... h_settings The regional definitions system lets a small amount of work and simple text file changes create sweeping changes
See
https://wiki.flightgear.org/Howto:Impro ... f_interest for a list of links for improving/changing something you see in-sim.
You should read up on Advanced Weather , including terrain effects/thermals, turning up turbulence, and tweaking convection etc:
https://wiki.flightgear.org/Weather#Advanced_Weather https://wiki.flightgear.org/Soaring#Advanced_WeatherKind regards