On Mon, 24 Apr 2000 00:45:49 -0400, Glen Berry wrote:
>What sort of range do the values have in a "typical" scene? 

In a scene with no funny textures or light sources, it is usually
in the range of 0 to 1, but lots of bright lights can cause areas
that are washed out.  Assuming that all of the objects have diffuse,
specular, reflection, filter, ambient, and transmit values that sum 
to 1 or less, it shouldn't ever be more than the sum of the values
of all the light sources in the scene, plus the largest ambient
value in the scene.

>What sort of min/max limits might be imposed on the values? (Simply
>the limits of floating point notation?)

Before they're clipped, yes.

>Are these values ever negative?

They can be, if you specify negative light sources or negative 
finish properties.

-- 
Ron Parker   http://www2.fwi.com/~parkerr/traces.html
These are my opinions.  I do NOT speak for the POV-Team.

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