POV-Ray : Newsgroups : povray.tools.poser : Poseray: what controls the specular size? : Re: Poseray: what controls the specular size? Server Time
14 Jun 2021 16:55:43 EDT (-0400)
  Re: Poseray: what controls the specular size?  
From: Thomas de Groot
Date: 20 Jul 2007 03:53:10
Message: <46a069e6$1@news.povray.org>
I did a little test with Silo too.

Silo has a material parameter called 'shininess', which controls the size of 
the specular highlights. By default, it is at value 127. This translates in 
Poseray to Specular Size 1, and hence to POV-Ray to a roughness of 
approximately 0.002

In the same way:
a shininess value of 10 in Silo, translates to Specular Size 10 and 
roughness 0.02443085
a shininess value of 20 in Silo, translates to Specular Size 5 and roughness 
0.01244878
a shininess value of 30 in Silo, translates to Specular Size 3 and roughness 
0.007655948
a shininess value of 40 in Silo, translates to Specular Size 3 and roughness 
0.007655948
a shininess value of 50 in Silo, translates to Specular Size 2 and roughness 
0.005259534
a shininess value of 60 in Silo, translates to Specular Size 2 and roughness 
0.005259534

I assume (but I may be wrong) that shininess plays a fairly identical role 
to 'glossiness' in DS. However, it works consistently as is shown by the 
test.

Thomas


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