Halftone Pattern

If you use the following image:

$image\diffuseglowbefore.gif$

And you were to call the function using the following settings:

The following figure results:

$image\halftonepatterndot.gif$

As another example, if you were to use the same original bitmap but call the function using the following settings:

The following figure results:

$image\halftonepatterncircle.gif$