Sorry if this has been asked before, couldn't find anything on it.

Anyone have any idea how to create those pillars that move the walls in certain parts of portal?

probably cylindars parented to a func_door that is triggered when you step in the right spot...

Yup that's it, they are a series of parented func_doors.

Yeah I asked this question too, but never got around to trying it for myself. Let us know if you get them working good.

It's really easy really. All you need is the pillars themselves and then do some math to figure out the individual lip values.