System: emitter

Structural

Parameter	Default	Range	What it does
palette_steps	0	0 – 16	Quantizes the palette into this many flat bands; 0 leaves it continuous.
shape	0	0 – 4	Which silhouette each mark is drawn as - a disc, a square, a star, and so on.
points	5	3 – 16	How many points or sides the silhouette has, where the shape has a count at all.

Modal

Parameter	Default	Range	What it does
spawn_rate	120	0 – 2000	New objects launched per second.
gravity	1.5	-4 – 8	Downward acceleration, in frame heights per second squared; negative floats them up.
launch_speed	1.75	0 – 6	Speed each object leaves the source at.
launch_angle	0	-1 – 1	Direction of launch, as a fraction of a turn from straight up.
spread	0.55	0 – 1	How wide the launch directions fan out about that angle.
lifetime	3	0.1 – 20	Seconds an object lives before it fades out.
lifetime_spread	0.45	0 – 1	How much lifetimes vary between objects; 0 makes them all die together.
source_y	-1.12		Height the source sits at, which is normally just below the frame.
source_width	1	0 – 4	How wide a line the objects are launched from; 0 is a single point.
spawn_fade	0	0 – 1	Fades each object in over the start of its life rather than popping it on.
prewarm	0	0 – 1	Back-dates the population so the first frame is already the steady state.
size	1	0 – 4	Size of each object’s mark.
size_spread	0.6	0 – 1	How much sizes vary between objects.
spin	0	-4 – 4	Turns per second each object rotates by as it flies.
twinkle	0	0 – 1	Per-object brightness flicker, seeded so it is reproducible.
brightness	1	0 – 2	The scene’s overall light level, multiplying what it draws before the composite.
hue	0	0 – 1	Where this scene reads from the palette, as a coordinate along it rather than a colour.
hue_spread	1	0 – 1	How far across the palette the object colours reach.
hue_center	0.5	0 – 1	Where that band sits along the palette.
saturation	1	0 – 1	Pulls the scene’s colour toward grey; 0 is fully desaturated, 1 is the palette’s own.
palette_mix	0	0 – 1	Crossfades from the preset’s palette to its second one; 0 is the first, 1 the second.
palette_contour	0	0 – 1	Draws a line at each band edge when the palette is stepped; 0 draws none.
zoom	1	0.25 – 4	Scales the whole scene about its centre; above 1 fills more of the frame.
pan_x	0		Slides the whole scene sideways, in the scene’s own units rather than pixels.
pan_y	0		Slides the whole scene vertically, in the scene’s own units rather than pixels.
star_valley	0.45	0 – 1	How deep the notches between a star’s points cut; near 1 the star becomes a disc.
star_curve	0	-1 – 1	Bows a star’s edges inward or outward instead of leaving them straight.
star_jitter	0	0 – 1	Randomises each point’s length by a seeded amount, so the star reads as hand-drawn.