Hi Bill, Ivan, Matt and JG,
Sorry for wasting your valuable brain cycles on this.
A few hours after posting, I realised what I needed to do, which is to
apply a stenciled alpha mask as JG mentioned.
Well at least it is good to know I was on the right track.
Thanks again.
Dominique
http://www.DelphiGamer.com := go on, write a game instead;