Here is a little video to show you haw to use this generator with volumetric light :
If you want to change the shape of this generator, you can select it either inside the Element Tree The hierarchical view of documents in Smode Read More directly inside it's parameters inside the Parameters Editor You don't have to search further, every parameters of a selected Element is there. Read More . To change the shape (position / orientation / size) select it in the element tree (red arrow):


Here is an example of a Random point generator with a box shape:


Here is a little comparison between this generator set as sphere and a Geosphere Even sphere Read More with a Random Points Allow to display points randomly over a geometry Read More Modifier over it.