engine/docs/en/graphics/particle/renderer-size-module.md

order, title, type, group, label

order	title	type	group	label
3	Size Over Lifetime Module	Graphics	Particle	Graphics/Particle

SizeOverLifetimeModule is a subclass of ParticleGeneratorModule used to handle size changes over the lifetime of a particle system.

Properties

Property	Description
separateAxes	Boolean value specifying whether the size changes independently for each axis
sizeX	ParticleCompositeCurve object representing the size change curve along the x-axis
sizeY	ParticleCompositeCurve object representing the size change curve along the y-axis
sizeZ	ParticleCompositeCurve object representing the size change curve along the z-axis
size	ParticleCompositeCurve object to get or set the size change curve of particles

Polyline Editing

For the ParticleCompositeCurve object, a polyline editor is built into the editor for visual curve adjustments.

Or in code:

sizeOverLifetime.enabled = true;
sizeOverLifetime.size.mode = ParticleCurveMode.Curve;

const curve = sizeOverLifetime.size.curve;
const keys = curve.keys;
keys[0].value = 0.153;
keys[1].value = 1.0;
curve.addKey(0.057, 0.37);
curve.addKey(0.728, 0.958);