Forensic, I only posted that as a "template/prototype", I am doing it as plugin, just advising of equivalent functionality.
(EDIT:- giving you opportunity to complain about it)
I am part way implemented but will probably take a few more days as I have several commitments that I
cant escape and probably will be compelled to spend some time in the boozer.
(Layer and Overlay will not actually come into it).
EDIT:- 99 max Radius seems a bit high, if jumping about would need to read in (99-1)+(99-1)+1 ie 197 frames
and that would require a long time. Do you have a more realistic maximum, even a radius of 10 would
require 19 frame read.