Quote Originally Posted by waldronate View Post
Those circles are the ridges caused by the absolute value of the spline interpolant on the noise field. They will become less obvious if you increase the number of octaves in the fractal generator (in Filter>>Calculate Height Field there is a little button labeled "BL" that will set the number of octaves to a value appropriate for your calculation zoom level). Note that you'll hit a limit in Wilbur's generator at about 12 octaves, which will be obvious because the display will start to break down.
Here is the image, sorry if I forgot, I already edited it , is there a way to fix the circles without having to rework the map?

b8a0e16af163fffc7285276f9eabd578.png

Also is it possible to translate vertically a whole map ? I have some nice continents but I would like to move them more upper north to have them covered in polar zone .