A complex approach - Iridescence in cycles

[Secrop]

@RonnieNeeley

I have read through this thread a few times now and still can not replicate what you are explaining. I am in love with the shader that sm48 quoted (post #89), but for the life of me can’t get anywhere close to it, even with your nodes and explanation.

A more detailed explanation would be greatly appreciated, however I understand if this is not possible as you have already given us enough!

Here’s a similar setup using both my and Michel’s scripts: