I've owned my camera for nearly a year, during which time I've taken a few thousand pictures. But until about a month ago I didn't know how to use any photo editing software. About a month ago, I finally decided to learn GIMP (I don't want to pay for Photoshop, and GIMP seems to be the most full-featured free alternative). After messing around with some photos of Boston for a while in GIMP, I managed to create an effect that makes a photo look like it was sketched with colored pencils. Here are several examples:
The State House
The Swan Boat Pond on the Boston Common
Trinity Church in Copley Square
View from the Longfellow Bridge
Washington Monument and the Reflecting Pool
Here's a link to a Picasa album of photos with this effect.
Most of these are pictures of Boston, but some are from a trip to Washington D.C.
Comments and criticism are welcome.