Yafray renders ugly material

I am creating an animation of falling images. If I render it with Blender Internal render, background is nice, but the paper is totaly white.


If I render it with Yafray, paper is very nice, but the background (Cork) is very ugly.


I tried to add cork image as backbuf image. But it got blurred, because I use defocus node to achieve DoF.

Is there any way I could combine rendered cork texture with yafray render? Or that I could have nice paper texture and nice cork texture at the same time.