Web/Mac based Heightmap generators?

[blueshogun96 2265]

I'm having trouble finding a heightmap generator compatible with MacOS lately.  At one point, I found a heightmap generator that would generate a completely random heightmap based on the specifications I ask for (i.e. Width and height), and it worked from a webpage, and would output a .bmp file that I could use.  I can't seem to find it anymore.  It's been a while though.

So, any other recommendations on building heightmaps?  It doesn't need to be the greatest, but generate relatively decent heightmaps, ideally in grayscale.  I've been googling for days, haven't found anything yet.  Any ideas?  Thanks.

Shogun

[dmatter 4844]

Something like this?

 

(I found that by searching for "perlin noise generator" in Google - this was just the top hit, probably there are others)

Edited June 15 by dmatter

[Kryzon 4630]

You can use the Compositor module of Blender to generate an image based on any sort of combination of procedural textures you may think of.

It's available for Mac and you wouldn't have to mess with 3D, just textures and the compositor.