The document discusses two experimental photography techniques:
The Harris Shutter Effect uses three color filters - green, blue, and red - to capture the same scene in separate layers with each filter. This creates a multi-colored effect, especially for moving subjects like waves. It has become easier to create digitally using Photoshop.
The Light Writing Effect is created using a slow shutter speed between 4-30 seconds to capture the movement of a light source. By sequencing the exposed frames, it gives the illusion that the light is writing or drawing a word or image. Any light source can be used to produce this effect, which makes photographs more interesting by creating things that do not physically exist.