I am working on a model from Blendswap and right now I am texturing it. In the viewport it looks realy nice also with some reflections on the windows. But if I render this final, there aren´t reflections on the windows anymore. Also the final image is much darker than the other one. The lightning comes from a sphere with envirement texture. All elemets are visible in the render and the viewport.
I have uploaded two images.
Maybe someone can help!