Need help with undocumented Mathf.PerlinNoise

Mathf.PerlinNoise (float x, float y);

I want to use PerlinNoise to create textures like http://freespace.virgin.net/hugo.elias/models/p_128.jpg for heightmaps and moisture maps as well as like http://umbrarumregnum.110mb.com/images/art_rivers_01_full.jpg for river paths.

The problem is I want to generate them at run time and for a given seed to always create the game map. I don't see any options with Mathf.PerlinNoise other then the X and Y co-ords. Can I set a starting seed? The Frequency and Amplitude? (http://freespace.virgin.net/hugo.elias/models/m_perlin.htm)

Can someone post scripts that would generate an image like:

Heightmap and one like Riverpath?

Hi,

I think this is what you want:

http://www.unifycommunity.com/wiki/index.php?title=TerrainPerlinNoise

Bye,

Jean