I've got an Ubuntu setup with OpenBox, and I'm just using it to play various media using vlc and feh.
When switching media I have been "fading out" by using
xrandr --brightness to decrement the screen brightness, then swap out the media, then fade back in.
This approach is a bit tedious, and on my new Intel Ivy Bridge GPU, it looks terrible and lags horribly.
Is there another way to simply fade out / back in, perhaps with a screensaver or other X command?