I'm a  user of Vuforia 8.3.8. and Unity 2018.4.27f1.

I want to switch between Single and Stereo Camera in the same app using the button. 

Firstly, I supposed to create 2 AR Cameras and change the setting of each objects' Device Type. ( "Viuforia Behaviour Script - Digital Eyewear - Device Type - Handheld and iPhone + viewer (Generic Cardboard)) But, it didn't work well because the setting is only one in the one project.

So I searched for a solution and came up with this post, which probably has the same problem as me.

https://developer.vuforia.com/forum/general-questions/switch-between-single-and-stereo-camera-vuforia-50

But unfortunately I don't understand. It's also another version of Vuforia. I thought maybe there are some other solutions. If that post is the only solution, what should I do first?

Thank you.