Properties of Spot Sources
Parameters specific to the spot light source:
Attenuation: angle of aperture of the spot, value between 0 and 175 degrees.
Aperture: angle of aperture of the intensity zone, value between 0 and 175 degrees.
Choose one of the items from the attenuation type list: Slow linear attenuation , Rapid linear attenuation , Slow quadratic attenuation, Rapid quadratic attenuation, Physical attenuation.
Gizmos for Aperture and Attenuation Cones
The spot light gizmo involves a target point. This target point is located on the symmetry axis of Aperture and light Attenuation cones.
The target point of the spot has its own translation and rotation gizmos, which simplifies its positioning. The spot light source orientation is updated during the movement when the translation and rotation gizmos are used.
Translation gizmo: a normal translation gizmo is attached to the target point.
Rotation gizmo: manipulating the rotation gizmo of the target point moves this point the same way manipulating the rotation gizmo of the light source would.
Positioning a spot light directly using its own gizmos is still possible.
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Moving the target point of the spot light using the translation gizmo.
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Moving the target point of the spot light using the rotation gizmo.
It is also possible to move a source and a target simultaneously by clicking on the blue part of the gizmo.