"Ian Crofoot" <nomail@nomail> wrote in message 
news:web.439d5320bf36aed9265c44900@news.povray.org...
> [url]http://img.photobucket.com/albums/v505/imcmonkey/problem.jpg[/url]
>
> I turned down the ambience and brilliance to illustrate the problem here.
>
> If it's not readily apparent, the light is only lighting part of a smooth,
> even, surface.  You can see at the back of the desk it goes really crazy.
> There's nothing obstructing the light's path, either.  It is above the
> center of the desk a little over a foot high.  You can tell this by 
> looking
> at the shadows.
>
> I'm using very basic light source and texture here, so I don't know what 
> the
> problem is.
>
> light_source {
>  <52.5, -6.2, -20>
>  rgb <1,.97,.9>
>
> }
> #declare wood_WingsMat =
>  texture{
>      pigment{ rgbf <0.726940, 0.646726, 0.436164, 0.00000e+0>}
>      finish{
>        ambient 0
>        diffuse 1
>        brilliance 0
>        specular 0.500000 roughness .05
>        }
> }
>
> Can anybody help a poor, lost soul?
>
>
>

What is the desk made of?
If it's a mesh, then you may find that it's a problem with normals.
If some mesh normals point up and some point down, then you can get dark 
bands across the surface.

Chris B.

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