Doesn't seem to work for meImport as design map, redraw heightmap, say good bye to contouring. Either that or, import heightmap, resample to 1/2 size, resample back to original size, l3dt redraws it = 32bit heightmap.

I make a map in l3dt then export it to smooth things and re-size it, and when i import it back contour lines appear and i cant get rid of then in either of the suggestion FA made in the quote. I'm going to cry soon...
Goolash.