2009

words, the distance between Near End and Far End does not scale, or otherwise
affect, the apparent ramp of decaying light.
TIP Because decay continues to calculate dimmer and dimmer values as the
distance of the light throw increases, it's a good idea to set at least the Far End of
attenuation to eliminate unnecessary calculations.
Near Attenuation group
Start Sets the distance at which the light begins to fade in.
End Sets the distance at which the light reaches its full value.
Use Enables near attenuation for the light.
Show Displays the near attenuation range settings in viewports. For spotlights,
attenuation ranges appear as lens-shaped sections of the cone. For directional
lights, the ranges appear as circular sections of the cone. For omni lights and
spot or directional lights with Overshoot turned on, the ranges appear as
spheres. By default, Near Start is dark blue and Near End is light blue.
Far Attenuation group
Setting a Far Attenuation range can help improve rendering time dramatically.
TIP If your scene has a large number of lights, use Far Attenuation to limit the
portion of the scene each light illuminates. For example, if an office area has rows
of overhead lights, you could set Far Attenuation ranges to keep the lights’
illumination from being calculated when you render the reception area instead of
the main office. As another example, a staircase might have recessed lights on
each stair, as many theaters do. Setting a small Far Attenuation value for these
lights can prevent their (negligible) illumination from being calculated when you
render the theater as a whole.
Start Sets the distance at which the light begins to fade out.
End Sets the distance at which the light has faded to zero.
Use Enables far attenuation for the light.
Show Displays the far attenuation range settings in viewports. For spotlights,
attenuation ranges appear as lens-shaped sections of the cone. For directional
lights, the ranges appear as circular sections of the cone. For omni lights and
spot or directional lights with Overshoot turned on, the ranges appear as
spheres. By default, Far Start is light brown and Far End is dark brown.
Standard Lights | 5087