I'm trying to get an image that lets appear only the edges of my
objects.

But when I'm doing this:

global_settings { assumed_gamma 1 
                post_process { overwrite_file
                        color_matrix {< 0, 0, 0, 0, 0, 0, 0, 0, 0 >}
                        find_edges { 1, .5, 0, 1.5, 1.0, rgb 1 }
                }
}

the result is the edges, but all the black is appearing too in white and
the shadowed surfaces are becoming clear.

What am I doing wrong?

Thanx
DEPerere

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