I was checking out the Sketch Tutorial on the Paint.NET Forum and experimented with it a little bit and came up with a Colored Pencil tutorial.

  1. Open Image
  2. Duplicate Layer, Rename to "Layer Two"
  3. Adjust Layer Saturation to 0
  4. Invert Colors
  5. Set Blending Mode to "Color Dodge"
  6. Adjust Gaussian Blur to get desired results (~15-20 px)

Examples: Original - Colored Pencil - Pencil Sketched

Costa Rica - Original Costa Rica - Colored Pencil Costa Rica - Pencil Shaded
Costa Rica Costa Rica - Colored Pencil Costa Rica - Pencil Shaded