API Reference > imodeljs-frontend > Rendering > ParticleProps ParticleProps Interface Describes a particle to to add to a particle collection via ParticleCollectionBuilder.addParticle. The x, y, and z coordinates represent the centroid of the particle quad in the collection's coordinate space. Extends XYAndZ Properties Name Type Description size number | Readonly<WritableXAndY> The size of the particle, in the collection's coordinate space. transparency undefined | number The transparency with which to draw the particle as an integer in [0,255]. Inherited properties Name Type Inherited from Description x Readonly number XYAndZ x coordinate y Readonly number XYAndZ y coordinate z Readonly number XYAndZ z coordinate Defined in core/frontend/src/render/ParticleCollectionBuilder.ts Line 61 Last Updated: 11 June, 2024