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 # BAT (blender asset tracer)
 
-Modified version
-with Zip packer included
+Modified version of [Blender's BAT](https://developer.blender.org/source/blender-asset-tracer/browse/master/blender_asset_tracer/) 
 
+Modifications:
 
-Zip behavior
-the root folder of the zip use first the environment variable `ZIP_ROOT` (used with `os.getenv('ZIP_ROOT')`)
+- Additional export **Zip pack - keep hierarchy**   
+Standard Bat pack is doing an "assembly", modifying file internal links. This zip pack leave the file untouched.  
+Behavior:  
+  - The root folder for zipping use the environment variable `ZIP_ROOT` (accessed with `os.getenv('ZIP_ROOT')` if defined).  
+  - If there is no such env variable, it fallback to path specified in addon preferences.
+  - In the export browser window settings (sidebar), user can choose the packing root folder (prefilled by env or addon preference path)  
+  - If nothing specified, root will be automatically defined with the most upper folder covering the whole dependancies hierarchy. 
 
-If there is no such env variable it fallback to path specified in addon preferences.
-
-This root can be manually changed in the settings (sidebar) of the export browser windows.
+- Add All Udim texture in pack
 
 
 ### Changelog