R ambient

Name: r_ambient
Default value: "0"
Cvar flags: cheat
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This variable controls the amount of ambient lighting on the map. When this
variable is increased the map will become brighter and all walls and objects
will be rendered in a lighter color.
It was removed in QWCL and has been re-introduced in FuhQuake now, however it
can only be used when the server is running with cheats enabled (for example
"qwsv -cheats"), because it could be used as a cheat by making it easier to see
players in dark corners when no fullbright skins are used.