Thanks for your reply. It gives me hope.
I downloaded correctly the assets, and I can import them in my project. No problem. You said, then it's more a question of camera settings and it seems to be the key. Now I understand better.
However, I still have a question. There is text in these showrooms (such as "Your Text, or your logo"), and I found how to remove it. Now, what about changing the text with my own? So far, I could figure out how to do it.
Do I need for that the plug in called Popcorn FX? P.S: what you call your "silly" stuff is far more advanced than what I can even dream doing!!!