<div dir="ltr"><div>Hi folks,</div><div>I am trying to keep up with changes to ghostscript surrounding the support of transparency operations.  Brief recap: starting with GS 9.24, it was necessary to turn off "safer" mode in the ps2pdf step in order to support transparency because of security issues:</div><div>vulnerabilities: <a href="https://bugs.chromium.org/p/project-zero/issues/detail?id=1640">https://bugs.chromium.org/p/project-zero/issues/detail?id=1640</a></div><div>workaround: <a href="http://tex.stackexchange.com/questions/453780/pgfs-and-pstrickss-opacity-is-not-working/453786">http://tex.stackexchange.com/questions/453780/pgfs-and-pstrickss-opacity-is-not-working/453786</a></div><div><br></div><div>Unfortunately, the Artifex team has now changed the transparency implementation so that the ".setopacityalpha" and ".setshapealpha" operators no longer work at all in 9.51 and 9.52. This means that upstream code changes are required in order to continue to support transparency.<br></div><div><br></div><div>official notice: <a href="https://ghostscript.com/pipermail/gs-devel/2020-May/010295.html">https://ghostscript.com/pipermail/gs-devel/2020-May/010295.html</a></div><div>annoyed user's description (informative): <a href="https://github.com/vectorgraphics/asymptote/issues/155#issuecomment-633202297">https://github.com/vectorgraphics/asymptote/issues/155#issuecomment-633202297</a></div><div><br></div><div></div><div>For me, this meant that the old "-dNOSAFER" workaround was no longer effective. Allegedly they will introduce backward compatibility in 9.53? I don't quite understand. Anyway, I have fixed the problem by downgrading to gs 9.27 but I wanted to check my understanding, make sure this issue was being tracked, and see whether there is a plan to fix it.</div><div><br></div><div>Many thanks,</div><div>Brandon</div><div><br></div></div>