Given the recent shaders day/night video I have reason to believe the nature of slate will change as well, such that any maps made will be obsolete for that as well. Thus rendering mappers to people who figure out good atmospheric combinations and sky boxes for epic builds. Also making bricks and stuff but I dunno what other people are planning, but I have my own things in the works.
They say water will still be there but the slate floor will be gone.
Since all slate map textures are just water this shouldn't be a problem.
I don't think every slate map will have a day/night cycle. People like me would find that extremely annoying and it may be hard to build at times.
