Issue : Thumbnails not generated in Drone Designer. Thumbnails not visible in DataBuzz, Sting Client.

Steps to verify the issue: 1. Do a simple 'render to disk' of 3-5 frames with image type set to PNG or BMP or JPG. In case the 'render to Disk' function fails to render the sequential files (files are generated but are blank).
To rectify this issue  - Do a 'restore defaults' in the Drone Designer and restart the application. Ensure that the back color of the viewport is set to Black (0,0,0,255) and then verify the 'Render to Disk' Function. If this works, the Thumbnail should also be generated when saving templates.