Hi, I jusy try to duplicate AnimationClip data from FBX file, and remove some unuse curve. Oh it's Generic Animation, not Humaroid. First, I use Ctrl + D to copy, the *.anim file size just as same as my script at this moment. Then I use GetCurveBindings & SetEditorCurve to remove some bone's localPosition curve. But after I remove curves, the *.anim file size become over than double size!! (182KB => 446KB) I check the *.anim, and found some auto created data : 「m_EditorCurves」「m_EulerEditorCurves」and「m_ClipBindingConstant: genericBindings」 I remove these manually, and in Unity, nothing change. My Clip animations still work fine. Are these auto created data necessary? And how can I remove these by Unity Editor API?