I am trying to create heightmaps for generating adts with FractalWoW (see at the bottom for link to the tool on this site), I want to create the sort of islands we see in Outlands, so a zone with sheer cliff drop offs as the borders, but I am not entirely sure how to do it. I blame my complete inexperience and shitty maths, hehe.
In the readme for the tool, it says the following:
Only the red value of the image will be taken into consideration when reading the file. while 0 (black) is the lowest and 255 (white) is the highest value.
Height Multiplier: Takes Integer and Float values and simply multiplies the height an image has. So you can create shallow or steep cliffs easier.
Here is an image of part of what I'm doing:
The white should be the 'islands' and the black preferably empty void. To make the islands at roughly ground level and the black areas at the ocean bottom, how would I do it?
Tool Link: