A rendering option that yields extremely realistic shading effects. It can be used in conjunction with Global Illumination to create optimal lighting and shading effects.
With Final Gather, rays are first cast from the light (rather than from the camera, as with simple ray tracing). When a ray strikes an object, a series of secondary rays are diverted at random angles to calculate the light energy contribution from surrounding objects, which is then evaluated during the ray tracing process to add the effect of the bounced light. This basically turns every object into a light source so each object in a scene influences the color of its surroundings as in the real world.
