Reply To: How to know the angles to allow maximum yield? › Forums › Techniques, Tricks, and Tips › How to know the angles to allow maximum yield? › Reply To: How to know the angles to allow maximum yield? April 22, 2020 at 9:44 am #6511 LowjiberParticipant @Lowjiber Windowing occurs when one cuts less than the Critical Angle of the material. See my response to your GCS question.