You need to know which kind of illumination need to increase

FIRST:
if it is the whole scene which got a lack of light ..then use
    global_setting {
            assummed_gamma 1.1  ( less is the value , lighter is your
picture) (this light up the shadows, in fact the overall scene)


    also
 if there is not enought light sources for lighting you scene , you can add
    ambient_light 2.0 for exemple (i do not recommend to use this parameter)
}

SECOND:

If you think that the amouth of light from a particular light source is not
enough the increase the color by a factor color rgb 1.2*<0.1,06,1> instead
of <0.1,0.6,1> for exemple ..(increasing the color will not light the
shadows , that will light the illuminated partof the scene and darken the
shadows.)

LAST:
if you want to light the shadow, and contrast the scene, then use the
radiosity ..


in brief you must add the following

global_settings {
    assumed_gamma 2.2 // default value
   // ambient_light rgb <0.2,0.2,0.2>   // to use at last choice
    #include "rad_def.inc"
    radiosity{Rad_Settings(Radiosity_OutdoorLQ,off,off)} // look at the
'rad_def.inc' file into your pov/include folder
}


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news:web.4516560d8fdbbf612e23de600@news.povray.org...
> I'm new, please be kind.
>
> I have simple scene. the only source of light is from a point light source
> projecting through a slit in a wall that then falls on a prism.  I want
the
> resulting rainbow to illuminate the scene.
>
> I have the scene set up and it works nicely, except the image produced is
> too
> dark. What can I do?
>
> I cannot find any info on how to adjust the sensitivity of the camera.  I
> cannot see how to get the same effect from spot lights or other light
> sources as I need the slit shaped light source. Also, would spotlights
> actually be brighter?
>
> I would post the scene and image but I'm not allows to in this group -
> should I ask in another group?
>
> Regards,
> steven
>
>
>

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