Particles · 90–420
Changes density and neighbor count across the world.
How to experiment
Change one cause, then observe
Pause when a structure catches your eye. Count changes density, Motion changes travel speed, Forces scales interactions, Damping removes retained velocity, Radius changes neighborhood reach, Time step changes the integration interval, beta sets the short range zone as a radius fraction, and Families changes the active rule families.
Field notes
Eight settings, eight observations
Each setting has a bounded range beside its control. Damping is separate from the historical retention values carried by the original presets.
Motion · 0.45–1.8x
Scales travel speed and the visible pace of change.
Forces · 0.45–1.7x
Scales attraction and repulsion strength.
Damping · 0–0.5
Larger values remove retained velocity more quickly.
Radius · 20–180px
Sets how far each particle can feel neighbors.
Time step · 0.004–0.04s
Changes the integration interval while Motion stays separate.
Repulsion zone · beta 0.05–0.45
Sets the short-range zone as a fraction of the interaction radius.
Families · types 2–8
Changes how many particle families and rule rows are active.
FAQ
Sandbox questions
What does damping control?
Damping reduces retained velocity each step. A larger damping value calms motion more quickly; it is separate from the preset's historical retention values. Read the parameter guide.
What is the repulsion zone?
The beta control sets the fraction of the interaction radius occupied by short range repulsion. It is a radius fraction, not a generic force strength. Read the parameter guide.
What does time step change?
Time step changes the integration interval used for each simulation update. Motion scale remains a separate control. Compare starting worlds in the preset library.
Can I save my sandbox?
There is no account or saved history. Share configuration puts the selected settings and seed into a URL so the same starting configuration can be reopened. Use the main simulator for a quick run.