Hi,
I'm playing around with radiosity and media.
This is a test render for a component of a
scene I'm working on.

I'm not assuming this is a bug, just my total lack of
knowlege about radiosity :-)

I have
    radiosity {
        Rad_Settings(Radiosity_Normal, true, true)
    }
And the spheroids are marked hollow, filled with

#declare M_FruitB = material {
    interior {
        ior 1.473 // glycerine
        media {
            emission 0.4
            scattering { 1, 0.3 extinction 0 }
            absorption 0.7
            density {
                bozo
                scale 0.2
                turbulence 0.1
                #local Density = 3;
                density_map {
                    [0.00 rgb<1, 1, 1> * Density]
                    [0.49 rgb<1, 1, 1> * Density]
                    [0.51 rgb<0, 0, 0> * Density]
                    [0.98 rgb<0, 0, 0> * Density]
                    [1.00 rgb<1, 1, 1> * Density]
                }
            }
        }
    }
    texture {
        pigment { rgbt<0, 1, 0, 0.6> }
        normal { bozo 1.2 turbulence 0.2 scale 0.05 }
        finish {
            specular 1
            roughness 0.0001
            reflection {
                0.18
                fresnel on
            }
        }
    }
}

(The dark centers are just elongated black spheres)

There's no light source, just a
sphere {
        0, 300000
        hollow
        texture {
            pigment { White }
            finish {
                ambient 1
                diffuse 0
            }
        }
    }

So, how come the spheroids (sphere sweeps in fact)
seem to be focusing the light in random ways?
Or are they radiosity samples that aren't quite
right?

Any help greatly appreciated.
-- 
Bill Hails
http://thyme.homelinux.net/

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Bill Hails wrote:
> Hi,
> I'm playing around with radiosity and media.
> This is a test render for a component of a
> scene I'm working on.
> 
> I'm not assuming this is a bug, just my total lack of
> knowlege about radiosity :-)
> 
> I have
>     radiosity {
>         Rad_Settings(Radiosity_Normal, true, true)
>     }

Well - these settings are not very suited for a very difficult situation 
for radiosity like this.  It would probably help to start more simple, 
no normal, constant media, no ior.

Note you will have to use a high enough max_trace_level as well.  A more 
difficult (but quite useful) approach is to use a no-media, 
no-reflection and no-ior variant of the objects for radiosity.  This can 
be done with the no_radiosity flag in MegaPOV.

Christoph

-- 
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 27 Feb. 2005 _____./\/^>_*_<^\/\.______

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