Editing FlightGear (section)

===== Environment rendering =====
''Flightgear''<nowiki/>'s Advanced Light Scattering framework simulates locations in time as well as space. The environment simulation renders seasonal change as leaves of different species of trees, bushes, and grass change colour or fall.<ref>{{Cite web|last=|first=|date=February 21, 2015|title=Simulating the ever-changing scenery – FlightGear Flight Simulator|url=https://www.flightgear.org/tours/simulating-the-ever-changing-scenery/|url-status=live|archive-url=https://web.archive.org/web/20201205083451/https://www.flightgear.org/tours/simulating-the-ever-changing-scenery/|archive-date=5 December 2020|access-date=2019-08-31|website=FlightGear.org|language=en-US}}</ref> Simulated swaying of grass, trees and windsocks provide cues to processes changing the windfield near the ground, while wave simulation provides cues near water.<ref name=":232" /><ref name=":022" /><ref name=":2" /> Cloud shadows and the general state of the atmosphere affect light traveling to each point of the environment and then traveling in the atmosphere to reach the eye - the cloud setup and particle spread in the atmosphere changes the colour of the light cast on the environment.<ref name=":232" /> Water colour therefore changes based on atmosphere overhead, and also depends on water impurites in a region. ''FlightGear'' is capable of rendering a variety of [[Types of volcanic eruptions|volcanic activity]] of different intensity that, from v2019.2, responds to the windfield, as well as smoke.

The combination of rendering of the state of atmospheric processes, Aurora, simulation of celestial bodies, ground accumulation of rain or snow or dust, ice cover of water, and the environment simulation produces visualisations with a vast number of permutations.<ref name=":232" /><ref name=":022" /><ref name=":4" /><ref name=":1" />