OptionalbackgroundThe virtual from which to source the background
Optionalbackground_How to stretch the background source pixles to the effect pixels
OptionalforegroundThe virtual from which to source the foreground
Optionalforeground_How to stretch the foreground source pixles to the effect pixels
Optionalinvert_Switch Foreground and Background
OptionalmaskThe virtual from which to source the mask
Optionalmask_1 default = luminance as alpha, anything below 1 is mask cutoff
Optionalmask_How to stretch the mask source pixles to the effect pixels
Specific configuration for the 'blender' effect.