In older versions of tksurfer, it was possible to set a renderoffscreen flag (in a tcl script) that would make it possible to render images in the background. I find this very valuable for rendering large batches of stats.
I would like to store surface-painted timeseries data in mgh format and render each frame in order to make a movie. Since the old version of tksurfer will not read mgh files, I need to use the new one for this. But rendering onscreen is very annoying because it means you can't use your computer for hours (if rendering lots of images).
The problem seems to be that tksurfer is opening a window and drawing it twice before the tcl script even begins to be interpreted. Is this something that can be fixed? Just in general, why should time be wasted drawing the surface twice upon opening? And can the tcl script be interpreted *before* any open_window or redraw commands are given?