POV-Ray : Newsgroups : povray.newusers : sun : Re: sun Server Time
15 May 2024 14:56:28 EDT (-0400)
  Re: sun  
From: Alain
Date: 13 Aug 2011 12:43:04
Message: <4e46a998@news.povray.org>

> Hi,
>
> I'm trying to render my appartment is realistic as possible. So for that I put a
> huge sun above it:
>
> // distance: 150.000.000km, diameter 1.932.000km
> light_source {<0, 15000000000000, 0>  color White
>                  area_light<193200000000, 0, 0>,<0, 0, 193200000000>, 5, 5
> adaptive 1 jitter
>                  looks_like {
>                          sphere {<0, 15000000000000 + 193200000000 / 2, 0>,
> 193200000000/2 pigment { color rgb<0.85,1.0,0.85>  } }
>                  }
> }
>
> please note that 15... above (and the 1932 of course) are in cm.
>
> I also added a sky_sphere.
>
> The complete scene is at http://vanheusden.com/pov/flat.zip
>
> Now the main room (render the test.pov for that) is rather dark. Much darker
> then  it was in reality. Of course I could add an extra light just before the
> window but that's faking it too much.
> What would be the solution?
>
> Thanks!
>
>

Use the parallel attribute for your sun.
Place it MUCH closer, like 1 000 000 times closer!
Reduce the size of the area_light and the looks_like sphere by that same 
amount.
You may possibly get by using adaptive 0, but use a higher density for 
the area_light. 17 x 17 is good.
Make it circular and use orient. This will nicely simulate a spherical 
light_source.

As it is, your sun is straight up. Removing it will not change anything 
as there is nothing for it to shine upon that can indirectly illuminate 
the interior.

You don't have any ground outside your room. Add something like plane{y, 
-30 pigment{Some_colour}}


Alain


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