API Reference > imodeljs-frontend > Rendering > ParticleCollectionBuilder > addParticle addParticle Method Add a particle to the collection. If size is omitted, this.size is used. If transparency is omitted, this.transparency is used. addParticle(particle: ParticleProps): void throws Error if particle size is defined and not greater than zero. Parameter Type Description particle ParticleProps Returns - void Defined in core/frontend/src/render/ParticleCollectionBuilder.ts Line 97 Last Updated: 29 November, 2022