This How To segment illustrates the difference between lighting in conventional animation software and the sophisticated lighting simulation known as Radiosity rendering.

While conventional animation software lighting works well for many purposes, Radiosity rendering is ideal for realistically rendering architectural interiors. In

Radiosity rendering real world lighting fixtures may be used and the contribution of direct sunlight and reflected sky light are taken into account. Most important of all, Radiosity rendering calculates the effect of light bouncing off of surfaces and illuminating other surfaces just as it does in the real world.