diff --git a/ReFuel.Gltf/Extensions/KhrMaterialsEmissiveStrength.cs b/ReFuel.Gltf/Extensions/KhrMaterialsEmissiveStrength.cs
new file mode 100644
index 0000000..2e49d53
--- /dev/null
+++ b/ReFuel.Gltf/Extensions/KhrMaterialsEmissiveStrength.cs
@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Text.Json;
+
+namespace ReFuel.Gltf.Extensions;
+
+struct KhrMaterialsEmissiveStrengthExtension
+{
+    public double EmissiveStrenght;
+
+    public KhrMaterialsEmissiveStrengthExtension(double emissiveStrenght)
+    {
+        EmissiveStrenght = emissiveStrenght;
+    }
+}
+
+public sealed class KhrMaterialsEmissiveStrengthExtensionProvider : IGltfExtensionProvider
+{
+    public string Name => "KHR_materials_emissive_strength";
+
+    public object ParseExtensionObject(GltfObjectKind parent, JsonElement element)
+    {
+        ArgumentOutOfRangeException.ThrowIfNotEqual(parent, GltfObjectKind.Material);
+        if (!element.TryGetProperty("emissiveStrength", out var property) || !property.TryGetDouble(out double d))
+        {
+            d = 1.0;
+        }
+
+        return new KhrMaterialsEmissiveStrengthExtension(d);
+    }
+
+    public void WriteExtensionObject(object obj, Utf8JsonWriter writer)
+    {
+        throw new NotImplementedException();
+    }
+}
diff --git a/ReFuel.Gltf/GltfCollection.cs b/ReFuel.Gltf/GltfCollection.cs
index 4bf252d..8469f07 100755
--- a/ReFuel.Gltf/GltfCollection.cs
+++ b/ReFuel.Gltf/GltfCollection.cs
@@ -16,7 +16,7 @@ namespace ReFuel.Gltf
             this.extensionMode = extensionMode;
         }
 
-        public void Parse(JsonElement collection)
+        public void Parse(GltfObjectKind parent, JsonElement collection)
         {
             if (collection.ValueKind != JsonValueKind.Object)
                 throw new Exception("Expected a JSON object.");
@@ -25,7 +25,7 @@ namespace ReFuel.Gltf
             {
                 if (extensionMode && GltfDocument.TryGetExtensionProvider(property.Name, out IGltfExtensionProvider? provider))
                 {
-                    Add(property.Name, provider.ParseExtensionObject(property.Value));
+                    Add(property.Name, provider.ParseExtensionObject(parent, property.Value));
                     continue;
                 }
 
@@ -33,7 +33,7 @@ namespace ReFuel.Gltf
                 {
                     case JsonValueKind.Array:
                         GltfList list = new GltfList();
-                        list.Parse(property.Value);
+                        list.Parse(parent, property.Value);
                         Add(property.Name, list);
                         break;
                     case JsonValueKind.False:
@@ -58,7 +58,7 @@ namespace ReFuel.Gltf
                         break;
                     case JsonValueKind.Object:
                         GltfCollection child = new GltfCollection(extensionMode);
-                        child.Parse(property.Value);
+                        child.Parse(parent, property.Value);
                         Add(property.Name, child);
                         break;
                     case JsonValueKind.True:
@@ -79,7 +79,7 @@ namespace ReFuel.Gltf
         {
         }
 
-        public void Parse(JsonElement collection)
+        public void Parse(GltfObjectKind parent, JsonElement collection)
         {
             if (collection.ValueKind != JsonValueKind.Array)
                 throw new Exception("Expected a JSON array.");
@@ -90,7 +90,7 @@ namespace ReFuel.Gltf
                 {
                     case JsonValueKind.Array:
                         GltfList list = new GltfList();
-                        list.Parse(element);
+                        list.Parse(parent, element);
                         Add(list);
                         break;
                     case JsonValueKind.False:
@@ -115,7 +115,7 @@ namespace ReFuel.Gltf
                         break;
                     case JsonValueKind.Object:
                         GltfCollection child = new GltfCollection(false);
-                        child.Parse(element);
+                        child.Parse(parent, element);
                         Add(child);
                         break;
                     case JsonValueKind.True:
diff --git a/ReFuel.Gltf/GltfDocument.cs b/ReFuel.Gltf/GltfDocument.cs
index 16b39b4..1be3147 100755
--- a/ReFuel.Gltf/GltfDocument.cs
+++ b/ReFuel.Gltf/GltfDocument.cs
@@ -293,8 +293,8 @@ namespace ReFuel.Gltf
             {
                 switch (name)
                 {
-                    case "extension": Extension.Parse(element); break;
-                    case "extra": Extras.Parse(element); break;
+                    case "extension": Extension.Parse(Kind, element); break;
+                    case "extra": Extras.Parse(Kind, element); break;
                     case "scenes":
                         AssertArray(element, "scenes");
                         foreach (JsonElement child in element.EnumerateArray())
diff --git a/ReFuel.Gltf/GltfEmptyExtensionProvider.cs b/ReFuel.Gltf/GltfEmptyExtensionProvider.cs
index 37e9d24..4412314 100755
--- a/ReFuel.Gltf/GltfEmptyExtensionProvider.cs
+++ b/ReFuel.Gltf/GltfEmptyExtensionProvider.cs
@@ -14,7 +14,7 @@ namespace ReFuel.Gltf
             Name = name;
         }
 
-        public object ParseExtensionObject(JsonElement element)
+        public object ParseExtensionObject(GltfObjectKind parent, JsonElement element)
         {
             throw new NotSupportedException();
         }
diff --git a/ReFuel.Gltf/GltfObject.cs b/ReFuel.Gltf/GltfObject.cs
index 5964218..5af5733 100755
--- a/ReFuel.Gltf/GltfObject.cs
+++ b/ReFuel.Gltf/GltfObject.cs
@@ -47,11 +47,11 @@ namespace ReFuel.Gltf
         {
             if (element.TryGetProperty("extras", out JsonElement extras))
             {
-                Extras.Parse(extras);
+                Extras.Parse(Kind, extras);
             }
             if (element.TryGetProperty("extensions", out JsonElement extension))
             {
-                Extension.Parse(extension);
+                Extension.Parse(Kind, extension);
             }
         }
 
diff --git a/ReFuel.Gltf/GltfSerializedExtensionProvider.cs b/ReFuel.Gltf/GltfSerializedExtensionProvider.cs
index d7e8cee..acaba27 100755
--- a/ReFuel.Gltf/GltfSerializedExtensionProvider.cs
+++ b/ReFuel.Gltf/GltfSerializedExtensionProvider.cs
@@ -16,14 +16,14 @@ namespace ReFuel.Gltf
                 throw new Exception("This type is not JSON serializable.");
         }
 
-        public T ParseExtension(JsonElement element)
+        public T ParseExtension(GltfObjectKind parent, JsonElement element)
         {
             return JsonSerializer.Deserialize<T>(element) ?? throw new Exception("Could not deserialize extension object.");
         }
 
-        public object ParseExtensionObject(JsonElement element)
+        public object ParseExtensionObject(GltfObjectKind parent, JsonElement element)
         {
-            return ParseExtension(element)!;
+            return ParseExtension(parent, element)!;
         }
 
         public void WriteExtension(T value, Utf8JsonWriter writer)
diff --git a/ReFuel.Gltf/IGltfExtensionProvider.cs b/ReFuel.Gltf/IGltfExtensionProvider.cs
index 2d8ad55..08ba209 100755
--- a/ReFuel.Gltf/IGltfExtensionProvider.cs
+++ b/ReFuel.Gltf/IGltfExtensionProvider.cs
@@ -7,7 +7,7 @@ namespace ReFuel.Gltf
     {
         string Name { get; }
 
-        object ParseExtensionObject(JsonElement element);
+        object ParseExtensionObject(GltfObjectKind parent, JsonElement element);
         void WriteExtensionObject(object obj, Utf8JsonWriter writer);
     }
 }
\ No newline at end of file