There are 3 quality settings for the 360 panoramic view.
LOW: This is the lowest setting that will allow you to render very quickly.
MEDIUM (recommended): This is a balanced setting between quality and rendering speed. This is the recommended setting for most computers.
HIGH (retina display): This is the highest setting and very slow to render. This setting is currently unavailable at this time.
Note: For optimal results please select the medium quality setting.
Quality settings for 360 panoramic viewer
