If you wish to use built in Webcam on Macbook Pro you need to use Photo Booth application.Photo Booth comes pre installed with Macbook 🙂
1. Click on Go –> Applications –> Select Photo Booth.
2. Photo Booth application will launch.
3. Photo Booth provides  many cool effects while taking snaps.Sepia, Black and white,Glow, Comic book,color pencil, Thermal Camera, X-ray, Pop art.No need to use any Photoshop separately to add effects. 😉
Other Effects Present in Photo Booth
- Like Clouds, Color Dots, Earthrise, Eiffel Tower, Fish, Rollercoaster, Sunset, Yosemite.
- Bulge, Dent, Twirl, Squeeze, Mirror, Light Tunnel,Fish Eye, Stretch.
I like Sunset & Eiffel Tower background animation 🙂