57.13 Opacity🔗ℹ

Global opacity is semantic model data in the closed interval from zero through one. Zero means completely transparent. One means fully opaque. Intermediate values multiply the complete rendered Visual, including fill and stroke.

Opacity is applied after Pict renderer selection. It does not change a Visual’s geometry, identity, drawing order, Pict bounds, or reference position. A zero-opacity Visual remains in the scene state until an operation removes it.