In article <3A663311.4A4A8FE1@faricy.net>, David Fontaine 
<dav### [at] faricynet> wrote:

> POVMan is a POV/Renderman hybrod or such IIRC.

It is an unofficial version of POV-Ray which supports RenderMan-like 
shaders.


> I'm going to venture a guess on shaders, but I don't actually know: does
> it let you specify a falloff_map of sorts, like a color_map or slope_map
> except related to brilliance and angle of incidence? I'm guessing
> because I notice hue changes perpendicular to the light direction in
> these renders.

Shaders are just bits of code that specify how the color of the surface 
is calculated. POVMan shaders are written in a special language that is 
different than POV-Script and based on the RenderMan lanugage, it is 
basically a way to customize rendering without having to patch the 
program. The shaders are interpreted, so there is a speed penalty for 
this flexibility. And I think POVMan shaders are just special pigments, 
so you should be able to combine them with ordinary finish and normal 
features, but would normally use ambient 1 to get the unmodified result 
of the shader.
Basically super-functions which can handle colors and vectors and have a 
different set of built-in functions, and result in a color instead of an 
index for a color_map.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

<><

Post a reply to this message