OptionaldensityOptionalscatterGlobal single-scatter albedo / fog tint.
OptionalanisotropyHenyey-Greenstein anisotropy for the sun phase (0 isotropic → 1 forward).
OptionalambientAmbient in-scatter so shadowed fog isn't pure black.
OptionalheightVertical density falloff (1 / scale-height); 0 = uniform with height.
OptionalheightWorld-Y of the densest fog.
OptionalmaxFar bound of the fog volume in world units; 0 = camera far plane.
OptionalvolumesInitial local fog volumes.
Base global fog density.