<!DOCTYPE html><html class="default"><head><meta charSet="utf-8"><meta http-equiv="x-ua-compatible" content="IE=edge"><title>Extensions | Babylon.js API documentation</title><meta name="description" content="Documentation for Babylon.js API documentation"><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="../assets/style.css"><link rel="stylesheet" href="../assets/highlight.css"></head><body><header><div class="tsd-page-toolbar"><div class="container"><div class="table-wrap"><div class="table-cell" id="tsd-search" data-base=".."><div class="field"><label for="tsd-search-field" class="tsd-widget search no-caption">Search</label><input type="text" id="tsd-search-field"></div><ul class="results"><li class="state loading">Preparing search index...</li><li class="state failure">The search index is not available</li></ul><a href="../index.html" class="title">Babylon.js API documentation</a></div><div class="table-cell" id="tsd-widgets"><div 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class="tsd-kind-icon">KHR_<wbr>materials_<wbr>clearcoat</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_emissive_strength.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>emissive_<wbr>strength</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_ior.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>ior</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_iridescence.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>iridescence</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_pbrSpecularGlossiness.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>pbr<wbr>Specular<wbr>Glossiness</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_sheen.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>sheen</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_specular.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>specular</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_translucency.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>translucency</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_transmission.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>transmission</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_unlit.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>unlit</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_variants.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>variants</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_volume.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>volume</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_mesh_quantization.html" class="tsd-kind-icon">KHR_<wbr>mesh_<wbr>quantization</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_texture_basisu.html" class="tsd-kind-icon">KHR_<wbr>texture_<wbr>basisu</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_texture_transform.html" class="tsd-kind-icon">KHR_<wbr>texture_<wbr>transform</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_xmp_json_ld.html" class="tsd-kind-icon">KHR_<wbr>xmp_<wbr>json_<wbr>ld</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.MSFT_audio_emitter.html" class="tsd-kind-icon">MSFT_<wbr>audio_<wbr>emitter</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.MSFT_lod.html" class="tsd-kind-icon">MSFT_<wbr>lod</a></li></ul></section></div></section></section></div><div class="col-4 col-menu menu-sticky-wrap menu-highlight"><nav class="tsd-navigation primary"><ul><li class=""><a href="../index.html">Exports</a></li><li class="current tsd-kind-namespace"><a href="BABYLON.html">BABYLON</a><ul><li class=" tsd-kind-namespace tsd-parent-kind-namespace"><a href="BABYLON.Debug.html">Debug</a></li><li class=" tsd-kind-namespace tsd-parent-kind-namespace"><a href="BABYLON.GLTF1.html">GLTF1</a></li><li class="current 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tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.EXT_mesh_gpu_instancing.html" class="tsd-kind-icon">EXT_<wbr>mesh_<wbr>gpu_<wbr>instancing</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.EXT_meshopt_compression.html" class="tsd-kind-icon">EXT_<wbr>meshopt_<wbr>compression</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.EXT_texture_webp.html" class="tsd-kind-icon">EXT_<wbr>texture_<wbr>webp</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.ExtrasAsMetadata.html" class="tsd-kind-icon">Extras<wbr>As<wbr>Metadata</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_draco_mesh_compression.html" class="tsd-kind-icon">KHR_<wbr>draco_<wbr>mesh_<wbr>compression</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_lights.html" class="tsd-kind-icon">KHR_<wbr>lights</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_clearcoat.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>clearcoat</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_emissive_strength.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>emissive_<wbr>strength</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_ior.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>ior</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_iridescence.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>iridescence</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_pbrSpecularGlossiness.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>pbr<wbr>Specular<wbr>Glossiness</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_sheen.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>sheen</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_specular.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>specular</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_translucency.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>translucency</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_transmission.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>transmission</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_unlit.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>unlit</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_variants.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>variants</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_materials_volume.html" class="tsd-kind-icon">KHR_<wbr>materials_<wbr>volume</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_mesh_quantization.html" class="tsd-kind-icon">KHR_<wbr>mesh_<wbr>quantization</a></li><li class="tsd-kind-class tsd-parent-kind-namespace"><a href="../classes/BABYLON.GLTF2.Loader.Extensions.KHR_texture_basisu.html" 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