API Reference > imodeljs-frontend > IModelApp > WebGLRenderCompatibilityInfo > missingOptionalFeatures missingOptionalFeatures missingOptionalFeatures: WebGLFeature[] An array containing optional features that are unsupported by this system. These are features that could provide a performance and/or quality benefit. Defined in core/frontend/src/RenderCompatibility.ts Line 85 Last Updated: 13 June, 2024