POV-Ray : Newsgroups : povray.beta-test : Subsurface scattering : Re: Subsurface scattering Server Time: 28 Feb 2020 04:01:06 GMT
  Re: Subsurface scattering  
From: William F Pokorny
Date: 5 Feb 2018 11:16:13
On 02/05/2018 04:20 AM, Mike Horvath wrote:
> I tried an old scene that worked properly in uberpov, but I see no 
> effect in 3.7.0 or 3.8.0 alpha.
> 
> Here are my global_settings:
> 
> 
> global_settings
> {
>      assumed_gamma    1
>      #if (Use_Radiosity = 1)
>          radiosity
>          {
>              pretrace_start    0.1
>              pretrace_end    0.001
>              recursion_limit    2
>              count            3
>              nearest_count    20,10
>              always_sample    off
>              maximum_reuse    0.1
>              minimum_reuse    0.001
> //            no_cache
>          }
>      #end
>      ambient_light    0
> //    mm_per_unit        0.4
>      mm_per_unit        1/4000
>      adc_bailout        0.001
>      max_trace_level    8
>      subsurface
>      {
>          samples 5, 5
>          radiosity true
>      }
> }
> 
> 
> Here is my finish:
> 
>      #declare lg_solid_finish = finish
>      {
>          ambient    0
>          #if (lg_quality >= 2)
>              diffuse albedo    0.9
>              specular albedo    PlasticSpecularity
>              roughness PlasticRoughness
>              fresnel on
>              reflection
>              {
>                  PlasticSpecularity
> //                roughness PlasticRoughness
>                  fresnel on
>              }
>          #end
>          conserve_energy
>      }
> 
> 
> Are there additional settings I am missing?
> 
> 
> Mike

You need a subsurface {} block in your finish {} block in addition too 
the one in global_settings {}.

Remember there are almost always example scenes for features. A 
subsurface.pov sample scene ships with POV-Ray. It can also be found 
online at:

https://github.com/POV-Ray/povray/tree/master/distribution/scenes/subsurface

Bill P.


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