You can edit the 3ds Max Biped template and save your customized templates. Once you save the customized Biped template, it appears in the Asset browser Characters folder.

To customize the 3ds Max Biped template:

1. Navigate to the Program Files > Autodesk > MotionBuilder <version> > bin > config > CharacterTemplate folder.
2. Create a copy of the 3ds Max Biped Template.py file.
   Tip

   It is good practice to make copies of MotionBuilder software files you wish to edit. Doing so ensures the original files remain intact.

3. Open the Copy of 3ds Max Biped Template.py file.
4. In the Windows dialog, choose the select the program from a list option and click OK.
5. In the Open With dialog, choose a Text editor program and disable “Always use the selected program to open this kind of file” and then click OK.
6. Make your changes to the file.
   • Make sure that the python script does not create a character as it creates conflicts.
   • If you have a scene with more than one character, characterize the last character added to the scene: ( FBSystem().Scene.Characters[len(FBSystem().Scene.Characters) - 1]. This is necessary because the character was created at the moment you applied the template. This way it is exposed to Undo functionality.
7. Save the file through File > Save As . In the Save As dialog select “All Files” from the Save as type drop down menu and give your file name a .py extension.
8. In the Character Template folder delete the Copy of 3ds Max Biped Template.py file.

   The new template appears in the Asset browser Character asset folder after you restart MotionBuilder.

   

   Characters folder A. Custom template

You can modify the current 3ds Max Biped Template.py script to accommodate a custom skeleton.

To modify the 3ds Max Biped Template.py script for custom skeletons

1. Navigate to the Program Files > Autodesk > MotionBuilder <version> > bin > config > Character Template folder.
2. Create a copy of the 3ds Max Biped Template.py file.
   Tip

   It is good practice to make copies of MotionBuilder software files you wish to edit. Doing so ensures the original files remain intact.

3. Open the Copy of 3ds Max Biped Template.py file.
4. At the start of the script, there are three variables that you must modify:
   • bipedrootname # for custom skeleton: set bipedrootname # to the name as the root node.
   • bipedPrefixNamingScheme = False # : this must be set to False for custom skeletons that do not use the normal biped naming conventions.
   • bipedMap # : populate this python dictionary with the custom mapping for your skeleton.