"Ive" <ive### [at] lilysoftorg> wrote in message news:4ee68d12$1@news.povray.org...
> Am 12.12.2011 22:37, schrieb Dre:
>> Awesome!
>
> Thanks.
>
>>How did you get that real nice blue light to work??
>
> Well, the construction of the ceiling, the dome and the whole lighting is 
> so simple that I'm almost ashamed of it ;)
>
> It is really just a clipped_by sphere and a torus (both with a radial 
> texture and emission) and one spotlight.
> The spotlight simulates two things at once:
> - the "daylight lamp" that would simulate the sun within the arboretum and 
> is currently close to zenith.
> - the "light tubes" surrounding the dome.
> The radius of the spotlight matches exactly the dome radius and the 
> falloff is adjusted to match the top of the port and starboard window 
> walls. It is yellow/red to compensate for the blue dome color and the blue 
> tint produced by radiosity. So we get an average white daylight condition 
> under the dome and a slightly bluish tint at the outside due the falloff 
> of the spotlight.
>
>   light_source { <0,10,0>  rgb <0.90, 0.85, 0.75>*5
>     spotlight point_at <0,0,0> radius 48 falloff 66
>     area_light x*0.67 z*0.67 5,5 adaptive 2 circular orient
>     fade_power 2 fade_distance FD*2
>     projected_through {Ceiling}
>   }
>
> This together with moderate radiosity settings
>
>   radiosity {
>     pretrace_start 0.08
>     pretrace_end   2/max(image_width,image_height)
>     count 250
>     nearest_count 10
>     error_bound 0.45
>     recursion_limit 1
>     low_error_factor 0.5
>     gray_threshold 0
>     minimum_reuse 0.015
>     brightness 1.0
>     adc_bailout 0.01/2
>     always_sample off
>     normal off
>   }
>
> produced the original image at 1920x1080 pixel within 24 hours - and I 
> consider this also as quite moderate given the incredible amount of grass 
> blades, leaves and petals ;)
>
> -Ive

Great stuff, sometimes the simple things are the best way to do things!

Thanks for the description, I'll sure have a play with that and see what I 
can come up with :)

Cheers Dre

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