Warmist mentioned earlier how it can be done, it's not difficult really. I'll try to add shadows like in the mockup (but not the fog).Btw, as I thought (and again I believe Warmist may have tried something like this already), it seems to be possible to render certain screens along the main screen on bigger displays - eg. like divide screen into several areas/tiles and have main screen in the largest tile and some other screens in other tiles always visible. Or have separate windows with different screens maybe. Don't know if this may be useful for anything though.Another semi-working idea - the grid doesn't have to be uniform across screens and even on one screen: