Le 14-03-02 06:04, Doctor John a écrit :
> On 02/03/14 10:18, Le_Forgeron wrote:
>> Le 02/03/2014 11:08, FNH nous fit lire :
>>> In the following scene I expect the white sphere to show a hint of red or green
>>> across its surface, thrown up by the nearby objects. Can anyone tell me what
>>> I've misunderstood about diffuse? Is there something that needs to be added to
>>> the sphere's texture?
>>
>> Study the scene radiosity/cornell.pov
>>
>> (from the delivered scenes with povray)
>>
>
> As Le Forgeron hinted, it's not additions to texture you need, but
> radiosity. Add the following into your global_settings:
>
> radiosity{
>      pretrace_start 0.04
>      pretrace_end 0.01
>      count 200
>      recursion_limit 3
>      nearest_count 10
>      error_bound 0.5
> }
>
> John
>

That's a rather high quality radiosity setting.

You can get descent results using only radiosity{} to enable radiosity 
using the default parameters.
For a test render, it's often enough.
The radiosity defaults are:
radiosity{
pretrace_start 0.08
pretrace_end 0.04
count 35
nearest_count 5
error_bound 1.8
low_error_factor 0.5
minimum_reuse 0.015
recursion_limit 2
normals off
media off
}



Alain

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