some snippets of a routine to create a dynamically drawn on 2d texture in unity

gistfile1.js

Dynamic drawing to a texture in Unity3d basic.  This is not complete working code but pieces cut out of working code so you'll have to look up the documentation for the functions called to get specific parameters and such.

static function CreateFooTexture ( ... )
{

  // create texture:

  var tex : Texture2D = new Texture2D(512, 512, TextureFormat.ARGB32, false);

  // get the pixels
  var cols : Color[] = tex.GetPixels( ... );

  // set the specific color values in cols here based on whatever your algorithm is:
  ... 
  // things like:  cols[rowbytes*ap.y + ap.x] = color;
  ...

  // then update the texture
  tex.SetPixels( ... , ..., rowbytes, rowbytes, cols );
  tex.Apply();	

  // set any texture properties you need
  tex.wrapMode = TextureWrapMode.Clamp;

  return tex;
}