diff --git a/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_materials_emissive_strength.cs b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_materials_emissive_strength.cs
new file mode 100644
index 000000000..dba1d4b00
--- /dev/null
+++ b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_materials_emissive_strength.cs
@@ -0,0 +1,53 @@
+using System;
+using UniJSON;
+
+namespace UniGLTF
+{
+    /// <summary>
+    /// https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_emissive_strength
+    /// </summary>
+    [Serializable]
+    public class glTF_KHR_materials_emissive_strength
+    {
+        public const string ExtensionName = "KHR_materials_emissive_strength";
+        public static readonly Utf8String ExtensionNameUtf8 = Utf8String.From(ExtensionName);
+        public float emissiveStrength = 1.0f;
+
+        static glTF_KHR_materials_emissive_strength Deserialize(JsonNode json)
+        {
+            var extension = new glTF_KHR_materials_emissive_strength();
+            if (json.TryGet(nameof(emissiveStrength), out JsonNode found))
+            {
+                extension.emissiveStrength = found.GetSingle();
+            }
+            return extension;
+        }
+
+        public static bool TryGet(glTFExtension src, out glTF_KHR_materials_emissive_strength extension)
+        {
+            if (src is UniGLTF.glTFExtensionImport extensions)
+            {
+                foreach (var kv in extensions.ObjectItems())
+                {
+                    if (kv.Key.GetUtf8String() == ExtensionNameUtf8)
+                    {
+                        extension = Deserialize(kv.Value);
+                        return true;
+                    }
+                }
+            }
+            extension = default;
+            return false;
+        }
+
+        public static void Serialize(ref glTFExtension materialExtensions, float value)
+        {
+            var f = new JsonFormatter();
+            f.BeginMap();
+            f.Key(nameof(emissiveStrength));
+            f.Value(value);
+            f.EndMap();
+            glTFExtensionExport.GetOrCreate(ref materialExtensions).Add(ExtensionName, f.GetStore().Bytes);
+        }
+    }
+}
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_materials_emissive_strength.cs.meta b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_materials_emissive_strength.cs.meta
new file mode 100644
index 000000000..71528af32
--- /dev/null
+++ b/Assets/UniGLTF/Runtime/UniGLTF/Format/ExtensionsAndExtras/KHR_materials_emissive_strength.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: d6a65b35aabda73408a522a2ef8e6a13
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfExportSettings.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfExportSettings.cs
index b35cfe965..1407cebfd 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfExportSettings.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/GltfExportSettings.cs
@@ -37,11 +37,6 @@ namespace UniGLTF
 #endif            
         ;
 
-        /// <summary>
-        /// VRMC_materials_hdr_emissiveMultiplier
-        /// </summary>
-        public bool UseEmissiveMultiplier;
-
         /// <summary>
         /// Keep VertexColor
         /// </summary>
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/GltfPbrMaterialImporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/GltfPbrMaterialImporter.cs
index c3500eeb3..526a7faed 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/GltfPbrMaterialImporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/GltfPbrMaterialImporter.cs
@@ -136,7 +136,11 @@ namespace UniGLTF
                 if (src.emissiveFactor != null && src.emissiveFactor.Length == 3)
                 {
                     var emissiveFactor = src.emissiveFactor.ToColor3(ColorSpace.Linear, ColorSpace.Linear);
-                    if (UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.GltfDeserializer.TryGet(src.extensions,
+                    if (UniGLTF.glTF_KHR_materials_emissive_strength.TryGet(src.extensions, out UniGLTF.glTF_KHR_materials_emissive_strength emissiveStrength))
+                    {
+                        emissiveFactor *= emissiveStrength.emissiveStrength;
+                    }
+                    else if (UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.GltfDeserializer.TryGet(src.extensions,
                         out UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.
                             VRMC_materials_hdr_emissiveMultiplier ex))
                     {
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
index 1fab2d3b1..92a95ff26 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/MaterialExporter.cs
@@ -23,7 +23,7 @@ namespace UniGLTF
             // common params
             material.name = m.name;
             Export_Color(m, textureExporter, material);
-            Export_Emission(m, textureExporter, material, settings.UseEmissiveMultiplier);
+            Export_Emission(m, textureExporter, material);
             Export_Normal(m, textureExporter, material);
             Export_OcclusionMetallicRoughness(m, textureExporter, material);
 
@@ -154,7 +154,7 @@ namespace UniGLTF
             }
         }
 
-        static void Export_Emission(Material m, ITextureExporter textureExporter, glTFMaterial material, bool useEmissiveMultiplier)
+        static void Export_Emission(Material m, ITextureExporter textureExporter, glTFMaterial material)
         {
             if (m.IsKeywordEnabled("_EMISSION") == false)
             {
@@ -168,14 +168,7 @@ namespace UniGLTF
                 {
                     var maxColorComponent = color.maxColorComponent;
                     color /= maxColorComponent;
-                    if (useEmissiveMultiplier)
-                    {
-                        UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.GltfSerializer.SerializeTo(ref material.extensions,
-                        new Extensions.VRMC_materials_hdr_emissiveMultiplier.VRMC_materials_hdr_emissiveMultiplier
-                        {
-                            EmissiveMultiplier = maxColorComponent,
-                        });
-                    }
+                    UniGLTF.glTF_KHR_materials_emissive_strength.Serialize(ref material.extensions, maxColorComponent);
                 }
                 material.emissiveFactor = color.ToFloat3(ColorSpace.Linear, ColorSpace.Linear);
             }
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/URP/GltfPbrURPMaterialImporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/URP/GltfPbrURPMaterialImporter.cs
index ab61c3053..e9996cfac 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/URP/GltfPbrURPMaterialImporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/MaterialIO/URP/GltfPbrURPMaterialImporter.cs
@@ -110,7 +110,12 @@ namespace UniGLTF
                 if (src.emissiveFactor != null && src.emissiveFactor.Length == 3)
                 {
                     var emissiveFactor = src.emissiveFactor.ToColor3(ColorSpace.Linear, ColorSpace.Linear);
-                    if (UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.GltfDeserializer.TryGet(src.extensions,
+                    if (UniGLTF.glTF_KHR_materials_emissive_strength.TryGet(src.extensions,
+                        out UniGLTF.glTF_KHR_materials_emissive_strength emissiveStrength))
+                    {
+                        emissiveFactor *= emissiveStrength.emissiveStrength;
+                    }
+                    else if (UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.GltfDeserializer.TryGet(src.extensions,
                         out UniGLTF.Extensions.VRMC_materials_hdr_emissiveMultiplier.VRMC_materials_hdr_emissiveMultiplier ex))
                     {
                         emissiveFactor *= ex.EmissiveMultiplier.Value;
@@ -175,7 +180,7 @@ namespace UniGLTF
 
             matDesc = new MaterialDescriptor(
                 GltfMaterialDescriptorGenerator.GetMaterialName(i, src),
-                ShaderName, 
+                ShaderName,
                 null,
                 textureSlots,
                 floatValues,