Hello all!

I am just starting to get into mapmaking using Wilbur and Fractal Terrains 3.

I am getting to know the software and I've followed many tutorials on this site, but I still have no idea how to make continental shelves. I was hoping to get some help from the sages on this site.

I have attached the image of what I am trying to create.

Which program (and which features therein) will help me achieve this effect?

Thanks!

Shelves.png