I need an aperture to conceal the edges of a dotstim object. This aperture creates a grey periphery to that dotstim.
My question is, is it possible to add visual stimuli on top of that grey periphery of the aperture? I would like to add a square that changes from black/white at the onset of a stimulus of interest, to be recorded by a photodiode.
Is there a way to set the depth of the aperture? Or would it possible to program a ring shape instead? I’ve tried to code a ring stimulus with
visual.polygon but the line width seems capped, preventing from creating a thick enough ring.