The forums ran from 2008-2020 and are now closed and viewable here as an archive.
do you know how to make this effect?
The exact implementation of that particular site’s ‘parallax effect’ was created by Steph Band and his “jParallax” jQuery script (and documentation) can be found here;
On a related note, I posted an example of a vertical parallax a few weeks ago. Here is the post;