Nice choices GregP!
The first one is a so called "disruptive camouflage". It was not meant to conceal the aircraft but rather to make it less recognizable, distorching its shape. In 1930s it was ususally applied on ships, to mislead the observer in evaluating speed, direction and type. USAAF had a go on aircraft...But there is no need to say how the result was.
The following two pics are incredible!