API Reference > imodeljs-frontend > Rendering > RenderSystem > findMaterial findMaterial Method Find a previously-created RenderMaterial by its ID. findMaterial(_key: string, _imodel: IModelConnection): undefined | RenderMaterial Parameter Type Description _key string The unique ID of the material within the context of the IModelConnection. Typically an element ID. _imodel IModelConnection The IModelConnection with which the material is associated. Returns - undefined | RenderMaterial A previously-created material matching the specified ID, or undefined if no such material exists. Defined in core/frontend/src/render/RenderSystem.ts Line 247 Last Updated: 11 June, 2024