Small white area appears in background in rendered images

[rlabib]

I ran some rendereings using revit 2013 , and windows 8 . But everytime I render a view I get a horizontal white area in the background that looks like a white fence, any ideas why this is hapenning?

I attached a rendered view ( draft quality) and a realistic view . you can see the white area in the background in both images.

Thanks in advance

[ccollins · Accepted solution]

That is the "horizon"--you can place some elements ( RPC trees, foliage, etc. ) in the far distance to make it look better.

Or, you can use a background image, but you will need to adjust your lighting/exposure.