POV-Ray : Newsgroups : povray.binaries.animations : Rotating Earth with day & night : Re: Rotating Earth with day & night Server Time
15 Jul 2024 07:09:01 EDT (-0400)
  Re: Rotating Earth with day & night  
From: Stephen
Date: 18 May 2017 02:09:44
Message: <591d3aa8$1@news.povray.org>
On 5/17/2017 11:01 PM, omniverse wrote:
> What I'm wondering most of all is why the Sahara Desert in Africa is all lit up.
> The other lights appear to be in their proper places, while north Africa looks
> like a large metropolitan area.
>

It is the image map. I recognised it when I stepped through the frames.
The latest from Blue Marble has that detail.
I have picked up a few sets over the years and comparing it to one from 
2008. You can see the lights coming on all over Africa and South America.

The image map might have been processed to get rid of the blue 
background. Which might enhance the contrast.

> Night and day terminator can be tricky to get right, as I know having tried it
> myself.
> Doesn't help that there's nothing real to compare to, since the Space Station
> photos I've seen are either fully night time or a day/night terminator with no
> artificial lighting visible at all in the darkness.


You are right. RL can be so disappointing. :)

-- 

Regards
     Stephen


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