Psuedo 3D Perspective?

[Unit9]

I've noticed a few sites achieving this pseudo 3D perspective in movie clips in flash where you have a square and two corners are closer together and the others further apart - giving a 3D perspective look - this can't be achieved with 'scew' right? So how are they doing it?

[senocular]

Some are pre-rendered in photoshop or video. Others will use skew but in a mesh that allows 2 or more skews to give the appearance of that kind of distortion. For more information see:
http://www.actionscript.org/forums/showthread.php3?t=128444