Here is cobblestone: If you see a mushroom, then I say you are indeed crazy. If you hover over it, you will find that it is clearly cobblestone. So... what color is the dress?... I mean, what texture do you see? Do you see a mushroom because you live in a '60s Star Trek fantasy world like @Monkey_Chicka? Or do you see cobblestone because that's what the computer told you to see?