I have no idea how to do some screen rendering nor did something like this before. But I want to make something like nausea effect but little bit more than just portal effect. I want to do something that will get the actuall player view and make it flipped and mirror it and blend it with the players view so it will look something like this:

 

And yes I want it to shake.

plus I would like to render the particles like every effect should render.

Thanks for any help

Okay I see that no one probably know how but can you at least tell me where should I get the rendered player view?