Update README.md

Author: Stefaaan06

README.md

@@ -40,17 +40,20 @@ It is usefull for reducing draw calls and improving performance.
 1. In the Unity Editor, select one or more GameObjects (any of them may have children with MeshFilters).
 2. Go to **Tools → Mesh Combiner** to open the combiner window.
 3. Toggle options as desired:
-
+4. 
     * **Strip inward-facing triangles**
     * **Cull mutually facing triangles** (and adjust the **Pair distance threshold**)
-4. Click **Combine Selected**
-
+5. Click **Combine Selected**
+6. 
     * Selected meshes are hidden under an `_oldMesh` group
     * A new `_combined` GameObject is created, with combined geometry, materials, tags, layers, and colliders
-5. To revert, select the combined GameObject in the Hierarchy and click **Uncombine**
+7. To revert, select the combined GameObject in the Hierarchy and click **Uncombine**
 
     * Restores original meshes, hierarchy, transforms, and deletes the combined object
 
 ## Contribution
 
-Any contribution is welcome as there is still a lot to improve and add.
+Any contribution is welcome as there is still a lot to improve and add:
+- Better readme with more images or gifs
+- Better workflow for editing merged meshes. Right now you have to Uncombine -> edit the objects -> Combine again
+- More and better optimisation methods