Changing diamond transparency
An diamond transparency applied to an object is a graduation of transparency from one level to another in a square pattern radiating out from the center. The pair of transparency arrows used to control it have a handle on one end and one at their joining point. The length of the arrows defines the width and height of the diamond. The transparencies of the center and outer edge are defined by the levels applied to the handles. By moving the outer handles you can stretch and squash the diamond. Moving the center handle moves the whole transparency.
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