Hi, In https://www.cgl.ucsf.edu/chimerax/docs/user/options.html, under `--offscreen`, it says "It cannot use a graphics card or hardware-accelerated rendering because OpenGL does not support rendering without a window." I wonder if there are any possible ways to utilize graphics cards in the headless mode, or if you have any best practices for saving pictures/movies for hundreds to thousands of structures, with or without a GUI. Thanks, Roden -- This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email.