Ability to fix perspective of a single panel?

[dibba]

First off, this is a superb plugin - thank you!

One question - if I have three custom panels, is there a way to keep the last panel from changing perspective so that it appears 'flat' during animation? I'm trying to do this so that the flow of the page appears to be pushing the page down.

edit: just to elaborate, after reading the docs the Custom Behaviour looks like it will do what I'm after:

"...For example, if you wanted to create a fold-in effect that keeps the first and last panels flat against the page surface"

So I'm after an accordion effect with 3 panels, the last panel to appear "flat". Not sure how to implement - any suggestions?

[Whip]

I'm trying to get the same effect. I know I'll have to use the map() function but no idea how. We need some more and detailed examples on this one.

I find it hard to understand how map() function works.