Do you see a gap? Probably not, but what is your brain putting in the blind spot to stop you noticing the blindspot? Is it the real text, or is it something enough like text for you not to notice that it isn't text?
Another kind of complex scene to use is an after image. If you stare at this picture for ten seconds, and then at the next one (which has a white background) you'll see a colour-afterimage (apologies for Kindle readers, and others viewing this in black and white. You'll still get an afterimage, it just won't be in colour).
Stare at this for ten seconds:
Then this:
