Fresnel Effect when exporting to YafRay

Just started playing with YafRay, and I noticed that the fresnel slider in the blender Mirror Transp tab doesn’t do a thing to affect fresnel in YafRay.

I looked at YafRay’s horrible documentation and saw something called a Fresnel shader block. I think maybe this has to be hooked up somehow to the Blender Shader in YafRay?? I have no idea what parameters to give it though.

So how do I get fresnel effect in YafRay?