Example for the “Bovination” filter
This filter adds “cow spots” to the active layer alpha
The image will always be resized to the active layer's size.
The filter fills the alpha channel with
... and maximizes the
Besides, the filter adds a Blur
layer as a light gray shadow and uses this layer as a Bump Map. Finally a (by default)
white “Background” layer is added below.
So the filter will end up with these layers: