Why looking through raytraced glass makes you lose depth?

Hello, I think this is my second week already trying to figure out what am i doing wrong. I am all set up for raytraced scene. In PPV everything is set to be raytraced as well. And look what a great difference between these two shots. Why is it that when you have raytraced refraction on glass makes my interior shadows much lighter compared to non raytraced refraction? Any way i can work with raytraced refractions on and not have this weird anomality? Totally ruins the look and feel. Glass is set not to cast any shadows. Material itself - very simple.