private void OnAssignMaterialModel(Material material, Renderer renderer)
    {

        string materialPathnew = "Assets/ArtAssets/Materials/walls/";
        int fileNameIndex = assetPath.LastIndexOf('/');
        string fileName = assetPath.Substring(fileNameIndex + 1);
        fileName = fileName.Substring(0, fileName.Length - 4) + "_mat.mat";
        materialPathnew = materialPathnew + fileName;

        Debug.Log(materialPathnew);
        string[] split = assetPath.Split('/');
        string newAssetPath = "";


   for (int i = 0; i < split.Length - 1; i++)
   {
       newAssetPath += split[i] + "/";
   }
        newAssetPath = (newAssetPath + "Materials/") + fileName ;


        //      Debug.Log(newAssetPath);

        var  assetType = AssetDatabase.GetMainAssetTypeAtPath(newAssetPath);
        Debug.Log(newAssetPath);
        Debug.Log(assetType);
        AssetDatabase.MoveAsset(newAssetPath, materialPathnew);
        AssetDatabase.SaveAssets();

    }