How to create an 360 image and 3D effect?

Hi,

i saw an interesting video here on how to create a 360° panorama image for VR using Photoshop. You have a kind of panorama template for orientation, on which you can draw. But how do you now create a 3D effect so that it looks like the cube is tangible in space and "sticks out" in VR headset?

I have placed this image side by side and moved it slightly, but it doesn't work.

That's how it's done in the VR videos, isn't it?

Best regards,
René