System: emitter

Structural

Parameter	Default	Range	What it does	Group
palette_steps	0	0 – 16	Quantizes the palette into this many flat bands; 0 leaves it continuous.	colour
points	5	3 – 16	How many points or sides the silhouette has, where the shape has a count at all.	shape, main
star_seed	0	0 – 255	Picks a different arrangement of the same amount of jitter and wobble - a whole number, and every value is as rough as every other.	shape

Modal

Parameter	Default	Range	What it does	Group
spawn_rate	120	0 – 2000	New objects launched per second.	motion, main
gravity	1.5	-4 – 8	Downward acceleration, in frame heights per second squared; negative floats them up.	motion, main
launch_speed	1.75	0 – 6	Speed each object leaves the source at.	motion, main
launch_angle	0	-3.1415927 – 3.1415927	Direction of launch, in radians clockwise from straight up.	motion
spread	0.55	0 – 1	How wide the launch directions fan out about that angle.	shape
lifetime	3	0.1 – 20	Seconds an object lives before it fades out.	motion
lifetime_spread	0.45	0 – 1	How much lifetimes vary between objects; 0 makes them all die together.	motion
source_y	-1.12		Height the source sits at, which is normally just below the frame.	shape
source_width	1	0 – 4	How wide a line the objects are launched from; 0 is a single point.	shape
spawn_fade	0	0 – 1	Fades each object in over the start of its life rather than popping it on.	light
prewarm	0	0 – 1	Back-dates the population so the first frame is already the steady state.	motion
size	1	0 – 4	Size of each object’s mark.	shape, main
size_spread	0.6	0 – 1	How much sizes vary between objects.	shape
spin	0	-4 – 4	Turns per second each object rotates by as it flies.	motion
twinkle	0	0 – 1	Per-object brightness flicker, seeded so it is reproducible.	light
brightness	1	0 – 2	The scene’s overall light level, multiplying what it draws before the composite.	light, main
hue	0	0 – 1	Where this scene reads from the palette, as a coordinate along it rather than a colour.	colour, main
hue_spread	1	0 – 1	How far across the palette the object colours reach.	colour
hue_center	0.5	0 – 1	Where that band sits along the palette.	colour
saturation	1	0 – 1	Pulls the scene’s colour toward grey; 0 is fully desaturated, 1 is the palette’s own.	colour
palette_mix	0	0 – 1	Crossfades from the preset’s palette to its second one; 0 is the first, 1 the second.	colour
palette_contour	0	0 – 1	Draws a line at each band edge when the palette is stepped; 0 draws none.	colour
zoom	1	0.25 – 4	Scales the whole scene about its centre; above 1 fills more of the frame.	shape
pan_x	0		Slides the whole scene sideways, in the scene’s own units rather than pixels.	shape
pan_y	0		Slides the whole scene vertically, in the scene’s own units rather than pixels.	shape
shape	0	0 – 4	Where on the silhouette roster each mark sits - a disc, a square, a star, and so on; a whole number is that figure exactly and a value between two travels from one to the other.	shape, main
star_valley	0.45	0 – 1	How deep the notches between a star’s points cut; near 1 the star becomes a disc.	shape
star_curve	0	-1 – 1	Bows a star’s edges inward or outward instead of leaving them straight.	shape
star_jitter	0	0 – 1	Randomises each point’s length by a seeded amount, so the star reads as hand-drawn.	shape
star_wobble	0	0 – 1	Waves each edge in and out along its length, leaving the points where they are - the wander a hand-drawn outline has.	motion
star_wobble_freq	1	0.5 – 2.5	How many waves the edge wander fits between a point and the notch beside it. Does nothing while star_wobble is 0.	motion