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12
Lighting
Light types can be combined in a scene.
Scoping
Directional lights can be grouped under a grouping node-for example, a light in a ceiling can be contained so that it doesn't illuminate anything outside the room.
The extent of Point lights and Spot lights can be controlled by the
radius
field.
Lighting can be simulated through texture mapping.
Simulating shadows or reflections. Expensive but effective.
Interactive shadow by Pioneer Joel.