Here is a small update of the scene :
https://3dboxme.shapespark.com/e1/
still can’t get realistic reflections in the living room although
I made the change in the light probe like @jan told me in the previous comment … 
- for example , all the kitchen cabinet is shiny but a small part is showing correctly
- in the tv unit , there is no continuity in the reflections although the surface is planar and the same material
- and the worst part , is the sharp line that I get in the floor reflection , is this the limit of visibility of the light probe ? I don’t understand …
