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.

http://img212.imageshack.us/img212/7831/blend201el4.th.png

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

http://img84.imageshack.us/img84/3978/yafray201tw8.th.png

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.