Saving rendered images with transparent background in Studio requires the Alpha Channel to be enabled.
To save a PNG image with Alpha, do the following:

  • Change to Production Mode.
  • Switch to the Channels Tab and check the Alpha Channel.
  • After rendering the image, press the bĀ button and select PNG Image+Alpha Files from the extensions drop-down.

Image 1: Save file window

Image 2: PNG File with Alpha

Please note that the PNG Image+Alpha Files extension will not appear in case the Alpha Channel has not been enabled.