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On 11/07/2012 10:08 PM, taftj wrote:
> Christian Froeschlin <chr### [at] chrfr de> wrote:
>> taftj wrote:
>>> Could somebody kindly post complete code for a very simple scene that uses
>>> radiosity? Maybe a white plane with a white box and nothing else. No matter
>>> what I try, I get either blackness or no effect. Something's not clicking I
>>> guess :(
>>
>> Try this:
>>
>>
>> #default {finish {ambient 0}}
>>
>> #include "colors.inc"
>> #include "rad_def.inc"
>>
>> global_settings
>> {
>> assumed_gamma 1.0
>> radiosity {Rad_Settings(Radiosity_Normal, off, off)}
>> }
>>
>> camera
>> {
>> location <0.0, 1.0, -3.0>
>> look_at <0.0, 1.0, 0.0>
>> angle 90
>> }
>>
>>
>> light_source {< -10, 10, -10> color White}
>>
>> sphere
>> {
>> 0, 1000 pigment {color SkyBlue} hollow
>> }
>>
>> plane {y, 0 pigment{checker color White color Black}}
>>
>> sphere {y,1 pigment {color White}}
>
> Thank you- that did work, but apparently I'm still not understanding something
> because when I remove the light source I see blackness. I thought the point of
> radiosity was that there was some "general" light without needing a specific
> light source.
>
> So I was expecting that even without an explicitly defined light source there
> would still be some light.
>
> Kind of like this:
>
> http://www.povray.org/documentation/images/tutorial/radB_01.jpg
>
> I also tried making the SkyBlue sphere glow by adding finish{ambient 1} to it's
> definition, but still got blackness. What am I missing?
>
Because if using radiosity is used any ambient term are effectively zero
... try emission instead
http://wiki.povray.org/content/Reference:Finish#Emission
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