Understanding the basics of CG Lighting...

Through all my years in the movie making industry I have studied the intricacies of CG Lighting techniques and have come up with the following article to give those just getting started some baseline knowledge on the concepts involved. Hope you enjoy! Overview Source of Lights Basic Lights Basic Lighting Setup Shadows Imaged Based Lighting Lighting Effect Source of Lights Including both natural and artificial sources This is a list of sources of light. The sun, moon, fire  and artificial source such as light bulbs etc.    Sunlight “Painting” and Sunlight “CGI”   In the past, artists observed and mimicked whatever there is in the natural world that they desired to paint. We can find several lighting conditions in the natural world or environments such as the most common and natural phenomena – sunlight. We have here on this second example, a computer generated image using the same sun-lit technique, forcing computer artists to do the same as painters to mimic what is in the environment world.   Candle Light   In an example of artificial light, such as light candles or light bulbs a similar challenge forces all kinds of artists including CG artists to follow the same rules of physical lighting. Most of the time using artificial lights helps achieve very dramatic scenery.   Basic lights   We have different ways of achieving these lighting effects. The most common lighting techniques used in any 3d program are spot lights, point lights and directional lights.  With these, we can achieve any result we desire in creating CGI images.   Key light A main light. It simulates the sun or moon. It also provide a main shadow on the objects.   Fill light No direct light. It could be sky or ambient.   Rim lights...