Trying to locate a certain screensaver..

Stay with me on this...there was a screensaver that would take your desktop wallpaper...build a cube...you were placed inside the cube and there was these different colored plasma balls that would go bouncing off the walls. Often times exploding in particles and different colors. I can't really explain it any better but it was amazing to watch. Does anyone remember the name??!? I thought it was part of the "Really Slick Screensavers" package but I don't see it there now. And yes, it ran under linux. Anybody??