Update README.md

This is the first Push, so there might be some errors, please let me know if you have any problem:

Contact: [email protected]

README.md

@@ -1,14 +1,32 @@
 # Unity-GLTF-Exporter
 Export from unity to glTF
 
+Note: I havent tried on Mac, I will try to add support on later time.
+
 Important Setup -> 
-1- Make sure to install "Shader Graph" package required to create Images for the exporter: 
+
+1-Clone/copy the full project inside Assets Folder
+
+2- Make sure to install "Shader Graph" package required to create Images for the exporter: 
 
 Window -> PackageManager
 
 In Unity Registry section, search for shader grraph, and install it.
 
-2- Add Mono_Export To GLTF to the desired parent node to export
 
-3- set at least gltf name, model create folder and export location, and press gltf test build
+Using the Exporter
+
+1- Add script: "Mono_Export To GLTF" to the desired parent node to export
+
+2- Set at least gltf name, model create folder and export location, and press gltf test build
+
+Adding custom "extras"
+
+1- Add script: "Object Node User Extras Mono" to the desired node to add an "extra" attribute
+
+2- Set desired attributes
+
+3- When exporting, your gltf file will contain any extra attribute added in Unity
+
+Support: [email protected]