When should I use Radiosity render modes?
You should use Radiosity render modes when: • The usual direct lighting and ambient light does not capture the lighting subtlety, contrasts, or colour tones satisfactorily. • There is a large contrast between the darkest and brightest parts of the model, or there are large colour contrasts among the lit areas in the model. • You are rendering interiors, where the light energy would eventually be dispersed to many surfaces. • You are rendering exteriors, and you want to see “washes” of light from overhangs, patios, sidewalks, etc.