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Hi,
A lot of the appearance depends on how long it is from detonation.
http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.htm
States:
2.05 The surface temperatures of the fireball, upon which the brightness (or
luminance) depends, do not vary greatly with the total energy yield of the
weapon. Consequently, the observed brightness of the fireball in an air
burst is roughly the same, regardless of the amount of energy released in
the explosion. Immediately after its formation the fireball begins to grow
in size, engulfing the surrounding air. This growth is accompanied by a
decrease in temperature because of the accompanying increase in mass. At the
same time, the fireball rises, like a hot-air balloon. Within seven-tenths
of a millisecond from the detonation, the fireball from a 1-megaton weapon
is about 440 feet across, and this increases to a maximum value of about
5,700 feet in 10 seconds. It is then rising at a rate of 250 to 350 feet per
second. After a minute, the fireball has cooled to such an extent that it no
longer emits visible radiation. It has then risen roughly 4.5 miles from the
point of burst.
and continues to describe color effects etc ...
DLM
"Zeger Knaepen" <zeg### [at] student kuleuven ac be> wrote in message
news:422d0f41@news.povray.org...
> slightly better shape, and a better background :)
> but it took 10 minutes to trace this time
>
> cu!
> --
> ZK AKA Gaeriel
> http://www.povplace.be.tf
> "Luckyly they included a button, right here, that'll blow the entire thing
> up!"
>
>
>
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