System: reaction_diffusion

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
palette_contour_style	0	0 – 3	Which line the contour draws: 0 a soft darkening, 1 a hard one, 2 a soft ink, 3 a hard ink.	colour

Modal

Parameter	Default	Range	What it does	Group
feed	0.0367	0.01 – 0.09	Feed rate of the reaction - with kill, it is what decides whether you get spots, stripes or mitosis.	shape, main
kill	0.0649	0.03 – 0.07	Kill rate of the reaction; small moves here change the pattern’s whole character.	shape, main
flow	1	0 – 4	How fast the simulation advances per second.	motion, main
inject	0	0 – 1	Drops fresh reagent into the field, which is how a beat seeds new growth.	motion
hue	0	0 – 1	Where this scene reads from the palette, as a coordinate along it rather than a colour.	colour, main
contour	6	0 – 24	How many bands the concentration is drawn as, as a real density: a fraction slides the whole set of iso-lines. 0 is a smooth gradient.	shape
hatch	5	0 – 24	Density of the hatching drawn along the concentration gradient.	shape
glow	1	0 – 2	Overall light the field emits.	light
color_span	0.85	0 – 1	How much of the palette the concentration range covers.	colour
color_center	0	-1 – 1	Shifts which concentration lands in the middle of 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
palette_contour_ink	0	0 – 1	Where along the palette an ink contour takes its colour; unread by the two black styles.	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