How to create a gameObject that behaves like a lens?

Hello everyone,

how can a gameObject be created that behaves like a lens? I can create an object that looks like a lens, but how can the refraction be implemented? Is it possible to create an upside-down effect?

(Background: In the game the player has to assemble binoculars. At one point he find lenses that should behave as real lenses until they are used.)

Thank you!

 

You can render a cube map from your scene and flip the textures upside down. And use a shader that let you add a cubemap for reflections.