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On 2/13/21 7:36 PM, William F Pokorny wrote:
> On 2/13/21 8:18 AM, Ash Holsenback wrote:
>> On 2/13/21 2:35 AM, Thomas de Groot wrote:
> ...
>>
>> spotted another difference with default for aa_level... 2nd paragraph
>> after 1st note has it at 4
>>
>> while: http://wiki.povray.org/content/Reference:Media
>>
>> has it at 3... inquiring minds wanna know
>>
>
> It looks like it is 3.
>
> media.cpp has:
>
> Media::Media()
> {
> Type = ISOTROPIC_SCATTERING;
>
> Intervals = 10;
> Min_Samples = 1;
> Max_Samples = 1;
> Eccentricity = 0.0;
>
> Absorption.Clear();
> Emission.Clear();
> Extinction.Clear();
> Scattering.Clear();
>
> is_constant = false;
>
> use_absorption = false;
> use_emission = false;
> use_extinction = false;
> use_scattering = false;
>
> ignore_photons = false;
>
> sc_ext = 1.0;
> Ratio = 0.9;
> Confidence = 0.9;
> Variance = 1.0 / 128.0;
>
> Sample_Threshold = nullptr;
>
> Sample_Method = 1;
> AA_Threshold = 0.1;
> AA_Level = 3;
> Jitter = 0.0;
> }
>
> Before anyone jumps on the Intervals, Min_Samples, Max_Samples and
> Sample_Method defaults above, in parser_materials.cpp we have:
>
> if (AllowToken(MEDIA_ID_TOKEN))
> IMediaObj = CurrentTokenData<Media>();
> else
> {
> /* as of v3.5, the default media method is now 3 */
> if (sceneData->EffectiveLanguageVersion() >= 350)
> {
> IMedia->Intervals = 1;
> IMedia->Min_Samples = 10;
> IMedia->Max_Samples = 10;
> IMedia->Sample_Method = 3;
> }
> }
>
> ---
> Won't that parser override sometimes mess up the defaults for method 1
> and 2 you ask. Yes, I think it well might... I'm not going to do the
> work to prove it now, but likely media 1 & 2 users will 'always' have to
> set the intervals to 10, min and max to 1 if they want documented
> defaults for those two methods.
>
> Bill P.
>
>
another question: are variance, confidence and ratio valid in method
3... given current narrative i'd say yes to the first two and no on the last
made some progress... here's what i have so far
http://wiki.povray.org/content/Reference:Sampling_Parameters_%26_Methods
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