Remember the legendary Predator movie with Arnold Schwarzenegger? Those Predator aliens had this thermal view feature so they could their prey even in complete darkness, let's Photoshop it.
A fun graphic design tutorial, a bit longer but still quite easy to follow. We will end up with a stylish looking, ink dripping smiley face. This is part two of the tutorial.
In Photoshop CS6, the new version of Photoshop, you can use special cropping tool and you are done, but that doesn't mean you cannot achieve the same result with older versions.