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On 12-3-2015 4:12, Alain wrote:
>> Thomas de Groot <tho### [at] degroot org> wrote:
>>> Aliens are reported on a daily basis, in particular on YouTube. However,
>>> and invariably, they are shaky, blurred, indistinct things. Only the
>>> POV-Ray telescope is able to show alien ships in all their pristine
>>> splendour coming to us from deep space.
>>> --
>>> Thomas
>>
>> Hi Thomas,
>>
>> that is a very good start indeed, but I see some options for
>> improvements.
>> First, the structure looks great, but too many areas are lost in the
>> shadows.
>> This seems to be a general problem with space scenes, since one has
>> only one
>> light source (star) close by. May be a binary star can solve this. The
>> orbiter
>> can still have a different color in this case. The second issue is the
>> engine
>> glow. IMO it should have more turbulence at the edges. Otherwise
>> really great.
>>
>> Best regards,
>> Michael
>>
>>
>
> I can't think of any source of turbulence in the vacuum of space.
> Once the gas/plasma leave the engines *realy, realy* fast, each of it's
> particles goes in a straight line, mostly indepently from the others.
>
Interesting. No interaction between the particles at all? Hmmm... I
suppose that would be minimal due to the eject velocity indeed, like you
say.
So turbulence is another of those things - like wings - which we should
put in the domain of imagination :-)
--
Thomas
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