They are different tools that appear to do the same thing, but using different methods. All I know is that the prescale offset brushes tend not to do as much accidental damage to the world as the other brushes do if you raise and lower the same piece of land repeatedly as a result of changing your mind about things being land or sea.

For a more technical explanation you would need someone like @jslayton - if he is available :)

Sounds exciting :)

Have a lovely time!

I think it was a brilliant idea, and I can see how it would halve the time taken to do a Ferraris Style map, maybe even more than that. In fact, if I could only lay my hands on that 25 hour day I had somewhere lying around this place I'd have a go myself :)

Looking good :)

Very nice job with the buildings, wall and tower. I had no idea the Watabou cities style could be combined with the Ferraris style at all, so kudos for that!

Only one thing to say so far: that speckling effect on the roads is likely due to the fact that they were never drawn with the Ferraris Style road tool, which draws two lines on two different sheets - the underlying sheet being the one that creates the edge glow and protects the road itself from getting transparency acne (the black spots). You could work out where to move the existing roads and what sheet to copy them onto and what properties to change by drawing a short sample road with the drawing tool and using Info->List from the menu. That would make them work a lot better for you, and would ensure they don't end up in the wrong order with all the other stuff in the map.

Not sure about the sastrugi, but I think the fissures are all done now.