A while ago it told you about a free beryl like program for windows, and that program was Yod’m 3D. Well I have science found a better program called Shock 4 Way 3D. It can be download at http://update.docs.kr/entry/Download-Shock-4Way3D-en and you can get the serial # at http://www.docs.kr/serial.php?product=shock4way3d&ver=100   This program gives you many more features. It is of course free. With Shock 4 way 3D you get many more effects. Now, it still is not beryl. But it is the next best thing for windows. It allows you to have 4 desktops. Unlike Yod’m 3D you can set a animated back ground behind the cube. How you do so is take any image you want and select a setting that will distort the image but make a video of it while doing so. Now you might now understand what I just meant but the video bellow might give you a better idea.  With this program you are also given options such as setting a global program (a program that will effect and be shown on all desktops,) you can also get a upper or lower view of the cube, it does not even need to be a cube it could be like the switching between windows effect in vista but using your desktops instead of windows.  It can be hard to explain so the following video at http://www.youtube.com/watch?v=4TyDXvsuwTg should give you a better idea of what I mean.