Bill DeWitt wrote:
>"PoD" <pod### [at] merlinnetau> wrote :
>>
>> pigment{ rgbf <1,1,1,-1> }
>> finish{ ambient 0.5 }  // this value threw me
>>
>
>    That makes a nice raised look (I am using text) but not quite an
>inverse. What I want would be something that shows white over black ,black
>over white, purple over green, green over purple... so that rgb<1,1,0>
would
>be rgb<0,0,1> etc.

It does make a perfect inverse if the camera rays passes through an odd
number of surfaces with that texture. If it passes through a object like
sphere or text, the rays will pass through an even number of surfaces with
the texture, and the background will be reversed back to normal again.

Greetings,

Rune

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