Extension attributes are really helpful when plugin developers want to add more attributes to a plugin without modifying the existing plugin code. In Maya, there are many ways to add/remove the extension attributes like MEL way, Python way and C++ API way as well. MEL Way to add/remove extension attributes: To add extension attribute, use addExtension command To remove extension attribute, use deleteExtension command To list only extension attribute of an object use "listAttr -ex object" Example: // Create unknown... Read more →