Hi!
Thanks for your answer.
The IOR slot is perfectly fine. What I don't know how can I turn off the IOR number(like 99999 in Max) and control it fully with an 1/IOR map.
I tried different settings, but it not works like it should(Max/Corona or Vray).
Okay, before I posted this, I tried it again and it seems I figured it out.
I have to set the IOR 999 at the maximum to turn it off, and the 1/IOR map needs to be inverted.
Can you confirm that this is the right way?
Anyway why do I have to invert the 1/IOR map? It should be consistent in every application.
Thanks.
Ps.: To be honest I'm not a C4D user, just tried to help to a friend.