Creating Islands in the Outlands style

[Vehk 0]

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:

 

[Vehk 0]

If there are easier/better ways to do it, I'm up for any suggestions! 

[Skarn 469]

OBJtoADT is way easier.

[Vehk 0]

32 minutes ago, Skarn said:

OBJtoADT is way easier.

This I assume? 

Is there any sort of guide to it? I didn't see a readme in the folder. I've never done this before, so the help is much appreciated! 

 

Edit: 

So after a bit of looking around, I found the how-to! But I am not sure if using a sculpt tool would be easier for me, hmm. For the FractalWoW tool, I have the image ready and just need to figure out what to set the values to. 

[Vehk 0]

So I thought I'd at least try to set the OBJ2ADT stuff up, but the biggest problem is the size of the map I need - 9x16 adts - crashes when I try to create it in blender for sculpting. 

For now it might be easier to just use fractalwow and figure out the values and create the adts from the png map I made, then do detail work in noggit. I love the idea of using blender in the future for smaller islands/areas though. 

Any help with the values in the OP would be much appreciated. 

[Skarn 469]

You could in theory use some software specialized for terrain which won't crash. You just need to make the resulting OBJ files match the converter's criteria.