Opacity

3D Modifier - Change the opacity of the geometry vertices using an input attribute

Same as Colorize Function but only to control opacity. The mask and gradient parameters are
replaced by the unique function Opacity.
In combination with 3D Mask , this can do powerful stuff.

Variables:

Opacity: Opacity function to apply to all vertices of the geometry.

Python

    Oil.createObject("OpacityGeometryModifier")