On 15-7-2018 23:45, Bald Eagle wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
> 
>> The problem is: how would you apply this to a black hole warp? I
>> mentioned the cylindrical warp, but with spiral1 or spiral2 the problem
>> would be the same. I have no idea at the moment.
> 
> Right.   Just throwing ideas out to spark some brainstorming.
> I'm assuming that at some point, someone will go "AHA!"
> 
> See "Black Hole" and "Tornado"
> http://www.bugman123.com/Renderings/index.html
> 
> and let us not forget:
> http://www.f-lohmueller.de/pov_tut/backgrnd/p_wat4.htm
> 

Yes, there are some pretty good whirlpool examples around in POV 
space... :-)

It is always what there is not that we want most urgently! ;-)

-- 
Thomas

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