forked from 1b-agent/opencadstudio-upstream
An image's transparency flag decides whether transparent pixels show what is behind the image or draw in their stored colour: the image pass and PDF plots now follow it (it was ignored, so every PNG alpha showed through). TRANSPARENCY selects images and asks for the mode, defaulting to the first image's current one. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>