OptionalgroundOptionalmode"off" (the default), "ground" or "sun"
Optionalquality"auto" (the default: standard on touch-only devices, high elsewhere); "standard": a 2048² map; "high": a 4096² map at finer depth precision and, once the camera rests, a 2048² view map of what it sees nearby and soft edges from the sun's disc
OptionalsectionDefault true: what a section plane cuts away casts no shadow
OptionalthresholdThe opacity (0..1) from which a transparent object casts with "threshold". Default 0.9
OptionaltransparentWhat transparent objects cast in the sun: "attenuate" (the default) lets through as much light as the object lets the background through on screen; "tint" the same in the hue of its colour; "threshold" a full shadow from the threshold opacity up and none below; "none" nothing. The ground shadow knows "threshold" and "none" only
Height of the ground that catches the shadow, in metres in display coordinates; null for the lowest visible geometry