=?ISO-8859-1?Q?J=F6rg_=27Yadgar=27_Bleimann?= <yaz### [at] gmxde> wrote:
> Meanwhile, I finally found out how to display object patterns produced
> from bitmaps vectorized with Inkscape correctly... but then, I found
> that either the lowest layer (a simple three-column flag gradient
> pattern) is darkened completely or significantly brightened (see
> attached image).
> The original color values for the three-column pattern are (in 8-bit
> notation):
> <0, 0, 0>
> <191, 0, 0>
> <153, 0, 0>
>
> But when I add the first layer with object pattern, the colors beneath
> darken significantly:
> <0, 0, 0>
> <125, 0, 0>
> <51, 0, 0>

An interesting thing to note is that the color values are not attenuated
linearly.

I suspect a gamma issue. You may want to check what happens if you choose
assumed_gamma 1.0 *and* File_Gamma 1.0 - I'd expect the output file colors to
match the input file then.


> - although the color for all parts outside the bezier spline is set to
> rgbft 1 and also the finish of the object pattern texture layer is
> ambient 1! From the second layer on, the red and green beneath is even
> reduced to a total black! How is this possible?

Did you check your max_trace_level and adc_bailout?

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