This first image is a very straightforward example of the Ebbinghaus illusion. There is roughly the same amount of pasta on each plate, but because one plate is bigger than the other (the plates can be seen as the encirclement) the pasta is seen as smaller. I thought was it was interesting example because it seemed like it could have been done completely unintentionally; just imagine someone distributing poster onto differently plates and thinking "Now I know that I put the same amount of pasta on each one..."