there is this art exhibit going on in london. (i'm countries away from there..) .. and it has everything to do with photo manipulation.  one of the is this one..and i'm getting way muddled up.. using bryce..where you can use a city.. create a water layer..and sink the city in it. how does one do this?? i seemed to have blanked out.. one of those 'dumb blonde'  moments,,  or s it painter?