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Here's what I did to import my photos...
global_settings {
// assumed_gamma 1.0
}
light_source {
0*x
color rgb <1,1,1>*1.5
parallel
point_at <0, 0, 1>
translate <0, 0, -1>
}
I did nothing else with lighting... not even adjust the "diffuse". I played
with "assumed_gamma" but decided not to use it. A few tests showed that the
rendered image looked exactly like the photo.
----- Original Message -----
From: "Di Gama" <di.### [at] gmail com>
Newsgroups: povray.binaries.images
Sent: Monday, December 11, 2006 4:29 PM
Subject: brightness adjustment
>I am working on a POV-Ray project which involves loading an external image
> and re-displaying it with no color adjustment. I recently discovered that
> "ambient 1" with no light_sources is not enough; the picture comes out
> brighter than the original. I traced the problem to the picture below. The
> top band is POV-Ray's rendering of a smooth gradient black to white at
> ambient 1 with no light_sources. The bottom band is an unmodified gradient
> black to white made by Fireworks. I hold in doubt neither gradient, and I
> think the problem lies in how the object color is transformed into a final
> pixel color. What is going on, and how can I disable or counter this
> change?
>
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