Screenshot & save as jpeg/png on local device

Hi Team,

Using WebObjects for 360 scenes until Storyline supports it (hint hint articulate), I want to simulate taking a photo of the 360 scene with a a camera that then download to the users device.

I've tried a couple of options through javascript using getDisplayMedia to no avail.

I'm hoping a better scripter than me (I'm a google-it scripter) has done this or has another idea as to how it could be executed. End result is I need them to be able to take screenshots of various scenes in the webobject (by clicking a hotspot or whatever - NOT using WIN+Shift+S or cmd+4) and it either downloads each individually to the user device as it happens or in bulk at the end.. 

Hoping someone has made this work!