Match perspectives between generated RT texture and its parent scene

[looeee]

Check out this similar discussion:

How to make the Magic Leap world-inside-world effect?

Magic Leap’s website has a nice world-inside-world effect. When you scroll, the camera pans backward from one world to the next, and the leaves from the tree flow from the inner world to the outer world. How can we achieve this world-inside-world effect with Three.js? Any ideas on what direction to take or techniques?

Also, try searching for ‘three.js portals’, you will find lots of similar projects.