diff --git a/ShadowEditor.Web/assets/js/three.js b/ShadowEditor.Web/assets/js/three.js
index 79f72980..81156a20 100644
--- a/ShadowEditor.Web/assets/js/three.js
+++ b/ShadowEditor.Web/assets/js/three.js
@@ -8720,8 +8720,12 @@
 			if ( this.normalMap && this.normalMap.isTexture ) {
 
 				data.normalMap = this.normalMap.toJSON( meta ).uuid;
-				data.normalMapType = this.normalMapType;
-				data.normalScale = this.normalScale.toArray();
+				if(this.normalMapType) {
+					data.normalMapType = this.normalMapType;
+				}
+				if(this.normalScale) {
+					data.normalScale = this.normalScale.toArray();
+				}
 
 			}
 
diff --git a/ShadowEditor.Web/src/editor/component/MaterialComponent.jsx b/ShadowEditor.Web/src/editor/component/MaterialComponent.jsx
index 210061a0..966ef8e5 100644
--- a/ShadowEditor.Web/src/editor/component/MaterialComponent.jsx
+++ b/ShadowEditor.Web/src/editor/component/MaterialComponent.jsx
@@ -224,7 +224,7 @@ class MaterialComponent extends React.Component {
             <NumberProperty label={_t('Roughness')} name={'roughness'} value={roughness} show={showRoughness} onChange={this.handleChange}></NumberProperty>
             <NumberProperty label={_t('MetalNess')} name={'metalness'} value={metalness} show={showMetalness} onChange={this.handleChange}></NumberProperty>
             <ColorProperty label={_t('Emissive')} name={'emissive'} value={emissive} show={showEmissive} onChange={this.handleChange}></ColorProperty>
-            <ColorProperty label={_t('Specular')} name={'specular'} value={specular} show={showSpecular} onChange={this.handleChange}></ColorProperty>
+            <NumberProperty label={_t('Specular')} name={'specular'} value={specular} show={showSpecular} onChange={this.handleChange}></NumberProperty>
             <NumberProperty label={_t('Shininess')} name={'shininess'} value={shininess} show={showShininess} onChange={this.handleChange}></NumberProperty>
             <NumberProperty label={_t('ClearCoat')} name={'clearCoat'} value={clearCoat} show={showClearCoat} onChange={this.handleChange}></NumberProperty>
             <NumberProperty label={_t('ClearCoatRoughness')} name={'clearCoatRoughness'} value={clearCoatRoughness} show={showClearCoatRoughness} onChange={this.handleChange}></NumberProperty>
@@ -319,7 +319,7 @@ class MaterialComponent extends React.Component {
 
         if (material.specular !== undefined) {
             state.showSpecular = true;
-            state.specular = `#${material.specular.getHexString()}`;
+            state.specular = `#${material.specular}`;
         } else {
             state.showSpecular = false;
         }
@@ -547,8 +547,8 @@ class MaterialComponent extends React.Component {
             editor.execute(new SetMaterialColorCommand(object, 'emissive', emissive));
         }
 
-        if (material.specular !== undefined && `#${material.specular.getHexString()}` !== specular) {
-            editor.execute(new SetMaterialColorCommand(object, 'specular', specular));
+        if (material.specular !== undefined && `#${material.specular}` !== specular) {
+            editor.execute(new SetMaterialValueCommand(object, 'specular', specular));
         }
 
         if (material.shininess !== undefined && Math.abs(material.shininess - shininess) >= 0.01) {
diff --git a/ShadowEditor.Web/src/serialization/material/MaterialSerializer.js b/ShadowEditor.Web/src/serialization/material/MaterialSerializer.js
index f24134fc..3b8e34d4 100644
--- a/ShadowEditor.Web/src/serialization/material/MaterialSerializer.js
+++ b/ShadowEditor.Web/src/serialization/material/MaterialSerializer.js
@@ -44,6 +44,14 @@ MaterialSerializer.prototype.toJSON = function (obj) {
     json.emissive = obj.emissive;
     json.emissiveIntensity = obj.emissiveIntensity;
     json.emissiveMap = obj.emissiveMap == null ? null : (new TexturesSerializer()).toJSON(obj.emissiveMap);
+
+    if (obj.specular !== undefined) {
+        json.specular = obj.specular;
+    }
+    if (obj.specularMap !== undefined) {
+        json.specularMap = (new TexturesSerializer()).toJSON(obj.specularMap);
+    }
+
     json.envMap = obj.envMap == null ? null : (new TexturesSerializer()).toJSON(obj.envMap);
     json.envMapIntensity = obj.envMapIntensity;
     json.flatShading = obj.flatShading;
@@ -117,6 +125,14 @@ MaterialSerializer.prototype.fromJSON = function (json, parent, server) {
     obj.emissive = json.emissive === undefined ? undefined : new THREE.Color(json.emissive);
     obj.emissiveIntensity = json.emissiveIntensity;
     obj.emissiveMap = json.emissiveMap == null ? null : (new TexturesSerializer()).fromJSON(json.emissiveMap, undefined, server);
+
+    if (json.specular !== undefined) {
+        obj.specular = json.specular;
+    }
+    if (json.specularMap !== undefined) {
+        obj.specularMap = (new TexturesSerializer()).toJSON(json.specularMap);
+    }
+
     obj.envMap = json.envMap == null ? null : (new TexturesSerializer()).fromJSON(json.envMap, undefined, server);
     obj.envMapIntensity = json.envMapIntensity;
     obj.flatShading = json.flatShading;
diff --git a/ShadowEditor.Web/src/serialization/material/ShaderMaterialSerializer.js b/ShadowEditor.Web/src/serialization/material/ShaderMaterialSerializer.js
index 283a5471..3f597ff4 100644
--- a/ShadowEditor.Web/src/serialization/material/ShaderMaterialSerializer.js
+++ b/ShadowEditor.Web/src/serialization/material/ShaderMaterialSerializer.js
@@ -36,6 +36,8 @@ ShaderMaterialSerializer.prototype.toJSON = function (obj) {
     json.vertexShader = obj.vertexShader;
     json.fragmentShader = obj.fragmentShader;
 
+    json.extensions = obj.extensions;
+
     return json;
 };
 
@@ -64,6 +66,8 @@ ShaderMaterialSerializer.prototype.fromJSON = function (json, parent, server) {
     obj.vertexShader = json.vertexShader;
     obj.fragmentShader = json.fragmentShader;
 
+    obj.extensions = json.extensions;
+
     return obj;
 };