gemelli david wrote:
> 
> I started a scene for a new radiosity test and I had this strange
> result...Where is the problem ? in my scene ? the result is the same
> with or without radiosity...
> 

The problem is in:

> // ground
> box {
>   <-500.0, -0.5, -500.0>, <500.0, 0.0, 500.0>
>   pigment {color 0.4}
>   finish {ambient 0.0 diffuse 0.5}
> }
> 

Change 'pigment {color 0.4}' to 'pigment {color rgb 0.4}'

'color 0.4' expands to 'color rgbft 0.4' and thereby you get a partly
transparent floor.  The ghost shape appears on the lower level of the
ground box.  

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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