API Reference > imodeljs-common > Rendering > RenderMaterialAssetProps > HasSpecular HasSpecular HasSpecular: undefined | boolean If true, this material has a value for specular reflectivity; if undefined, defaults to false. If false, specular value is actually set to 0.0 Defined in core/common/src/MaterialProps.ts Line 89 Last Updated: 12 June, 2024