Here's an article that somewhat explains it:
Wikipedia on Pinhole Cameras
The sunset shots were NOT taken with a pinhole. Pinhole lens's are generally very soft, show all of the dust on your sensor, and require multiple second exposures at a high ISO, as they have an extremely high aperture, like F100
I make my pinhole shots grayscale in GIMP becuase then they look stylish.
The feedback I've gotten on the last picture of each set has not been good on other places, so I'm probably going to delete them from the hosting site, if there is text andno image, that's why