Add objects in a background scene which is made by a sphere with a 360º picture

Hi, Do you know how to add objects in a background scene which is made by a sphere with a 360º picture as the texture? (this is an example of how my background scene is done: UE4 4.24 - Super quick 360 image into VR ! - YouTube)

I want to add some separated objects in the scene.

I was thinking in a plane with a texture, or 3d. But the plane looks bad when the perspective moves, so I was wonder if I could fix the perspective with a 360º picture of the object.

Do you know some techniques for get that? Thank you very much in advance. Isabel