Illumination
Usint the spline, the strength of opacity can be adjusted via the illumination intensity.
Use this setting to define (per drag & drop) which lights should be used. Normally, all lights in a scene will be used. In order to use only selected lights or to exclude lights, use the include or exclude modes accordingly.
Use this setting to define whether the modification should use lighting, its shadow or both.
Enable this option to invert a given effect.
This is the strength of the modifier’s effect, from 0% (no effect) to 100% (full effect).
Drag lights that should be included in rendering into this field.