(I must have stars in my eyes)...or I'm just sleepy. Just BTW and totally OT, Re: "Semisphere" (more usually known as "hemisphere").. In music notation, the situation is even more confusing. The basic note duration in (classical) music notation is the "breve". 1/2 a breve = a semibreve 1/2 a semibreve = a minim 1/2 a minim = a crotchet 1/2 a crotchet = a quaver 1/2 a quaver = a semiquaver 1/2 a semiquaver = a demisemiquaver 1/2 a demisemiquaver = a hemidemisemiquaver 1/2 a hemidemisemiquaver = a Naysay guy's brain capacity (bookmark) Cheers, Diolma