LightMaskCurtainOptions

The curtain along a light mask’s boundary: soft strips of dark air rising from the ground on the line, thinning upward into wisps.

Properties

Property	Type	Default value	Description
color?	ColorRepresentation	a blue black, #0d1220	The dark air’s colour, drawn unlit, under the scene’s fog.
far?	number	60	Metres from the camera past which it draws none, fading over its last quarter; the quality level’s curtainFar caps it, and the ground’s line carries the boundary beyond. Past near.
height?	number	2.5	Metres the strips rise above the ground at their tallest while the line stands still; motion stretches them, the line’s own and velocity alike. Above 0.
near?	number	3	Metres from the camera inside which the curtain fades out, so a player crossing the line walks through air rather than a card: none of it at half this, all of it from this out. 0 or more.
noise?	LightMaskCurtainNoiseOptions	undefined	The wisps the strips fray into.
opacity?	number	0.9	The most of what lies behind it the curtain hides, at its densest, just above its foot, 0 to 1.
spacing?	number	1	Metres between the strips’ joins along the line at most, before the quality level thins the tall wisps: the curtain is one unbroken wall of strips this long or shorter. A lit shape smaller than this may stand none. Above 0.
velocity?	readonly [number, number]	[0, 0]	Metres per second along x and z the strips lean with, added to the line’s own motion, which the engine reads from the mask’s change and which runs across the line alone: such as a wind along it.