When I run into trouble like that, instead of fudging and running into worse
troubles later,  I would make a sphere, usually bright red or green, and see
how it looks.    In fact, in most of my scenes I have a section

#if (WantTestObjects)
sphere { <-5, -10, 0>, .5  pigment {<1,.3,.3>} finish{ambient.5 diffuse .5}}
...etc....spheres....cylinders....etc....
#endif


These test objects have high ambient values to make them show unnaturally
luminous, and have diffuse as a lighting check.  I catch a lot of weird scene
bugs by noticing funny lighting on my test objects.


My guess is your camera statement needs some adjusting.


-- 
Daren Scot Wilson
dar### [at] pipelinecom 
www.newcolor.com
----
"A ship in a harbor is safe, but that is not what ships are built for"
                                            -- William Shedd

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