On Sat, 16 Dec 2006 15:41:57 +0100 <sofasurfer at gmail.com> wrote: > > ...if you strictly stick to dimentions and offsets that are > > even multiples of 4. > > is there any reason for not calling them 'multiples of 8'? Because they are multiples of 4. Perhaps I should have said: "evenly divisible" to be clear.