API Reference > imodeljs-frontend > Rendering > ParticleCollectionBuilderParams ParticleCollectionBuilderParams Interface Parameters used to construct a ParticleCollectionBuilder. Properties Name Type Description isViewCoords undefined | boolean If true, the finished graphic will be defined in view coordinates, for use as a decoration of type GraphicType.ViewBackground or GraphicType.ViewOverlay. origin undefined | Readonly<WritableXYAndZ> The origin of the particle collection in world coordinates. pickableId undefined | string If the particles are to be pickable, a unique identifier to associate with the resultant RenderGraphic. size number | Readonly<WritableXAndY> The default extents of the particle quad. texture RenderTexture The image mapped to each particle quad. transparency undefined | number The initial transparency of the particles as an integer in [0,255]. viewport Viewport The viewport in which the particles will be drawn. Defined in core/frontend/src/render/ParticleCollectionBuilder.ts Line 24 Last Updated: 12 June, 2024