Change the operation
transparency with the Mixer.
It defines how the function result (i.e. the color here) and the
underlying texture are mixed. A second texture can be set as Opacity
Map, which means that it works as additional mask. A paper
structure can be loaded with the Variator Map settings.
The Mixing Mode is very important for the outcome of the
function. Image 3 for example was done with the mode Add
and Gradient Ellipse as mask mode to create the