I have a experiment running in Fullscreen mode with a viewScale factor so the section of interest is smaller than the full screen size. I want the borders (like a letterboxed video) to be black, but I want the background color in the center section (the screensize * viewScale) to be gray. Specifically, when I call textStim to add text to the screen, I want the edge of the screen to be black but the center to be gray (http://www.psychopy.org/api/visual/textstim.html?highlight=textstim#psychopy.visual.TextStim)
I haven’t found a function yet to do this. Is this kind of functionality supported or should I try to use a .png image for the background?