Thanks for your answer, PPStudio.
I was testing for a while (on an empty c3p project with two sprites), trying those 256px between shadow (sprite2) and its source (sprite1) , and looks far enough, but I want to be sure before buying: in the embeded example you have limited the offset at the valuebar, do you? I can see the shadow it's not very far from the source, although you select max values on both bars (x and y offsets). Am I right?
As a suggestion for future version, I would mention a blur percent option :) (dreaming is free)