Hotspot is an interactive circle on the object which can take some action with your object after publishing. It means that published scene can take some interactive options.
The following actions can be performed by hotspot:
•Navigate to another view
•Change model appearance
•Change model color
•Open URL
Examples of hotspots you can see on the following image., When hotspot present on the object you can control size, color and opacity of hotspot, so it may become invisible in published scene.
Published hotspot shows hint, when user navigates to it by mouse
