Hi Hraban, PDF/X-1a:2001 doesn't support transparency. You have to use PDF/X-4(p) for that (the first X variant that supports transparency). PDF/A-2|3 may also be an option. These formats also support transparency. Peter Am 19.12.2019 um 21:49 schrieb Henning Hraban Ramm:
I think this is the same problem that I had in Bassenge: The transparent part of PNGs like the attached one becomes black if I try to make an PDF/X.
I hope that is solvable...
\setupbackend[format=PDF/X-1a:2001]
\starttext \externalfigure[kinder/esel_kl] \stoptext
Best, Hraban
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