Noise Derivatives,

In this tutorial you will create a mesh that looks like a terrain. You will also use noise to animate particle flows. You'll learn to

• Use a mesh to create a triangle grid;


• Compute surface normals for a vertex grid;


• Write a simple surface shader;


• Compute analytical derivatives of Value noise;


• Compute analytical derivatives of Perlin noise;


• Turn derivatives into normals.


• Use 2D Curl noise to flow particles around terrain features;


• Use 3D Curl noise to simulate volumetric flows.

This tutorial comes after the Noise tutorial. I assume you did that one first.

This tutorial has been made with Unity 4.5.2. It might not work for older versions.

Follow for more http://catlikecoding.com/unity/tutorials/noise-derivatives/