> Quote - Whilst he's sleeping, allow me to point you to this: > [ www.runtimedna.com/forum/showthread.php](http://www.runtimedna.com/forum/showthread.php?t=25885&highlight=Fresnel+Effect) > > I'm re-reading for the fifth time... lots of stuff I didn't get the first time. It's really complete!

Hello,
I played a bit with the glass shader from that thread, the 4-node version:

The surface looks really good, but the thickness of the glass seems to have no
influence on the refraction.
I made a test with a cube, scaled to 5% thickness, and the same, at 20%.
I would expect 4 times more shift of the refracted picture, but it is essentially
the same. Also, it does not matter if I use just the fresnel node.

My suspicion is, that Poser only refracts when a ray enters a surface, but not
when it leaves the refracting material. Can anyone confirm this?
If so, is there a trick to work around that?

Best regards,
   Micael