Render problem: final is not rendering like the preview

[Anonymous]

Few weeks ago I was doing some render that works perfectly with the Plaza environnement, but now I did my own environnement (360 .hdr) which is not perfect for now.

When I set the scene, the look on fusion is perfect, but when I render it gives a low quality render, with no reflections. At this point should I simply make a screen shot of fusion? Because it seems that the rendering process degrade the design. Thank you !