OptionalfaceColor: SelectionColorDefaults to blue at 15% opacity.
OptionalwireframeColor: SelectionColorDefaults to #cfe0ff.
Normalized RGBA edge color.
Normalized RGBA face color; alpha controls overlay opacity (clamped to 0..1 when rendered).
Whether to draw the translucent faces. Defaults to true.
Whether to draw the edges. Defaults to true.
How the ObjectStateManager's x-ray set is drawn (Viewer3d.setXRayVisualization): translucent faces and edges through the scene, independent of selection and of XRaySelectionVisualization. This is an overlay: the objects remain rendered normally underneath. Overlapping faces accumulate opacity. The ghost set (ObjectStateManager.addToGhostSet) is drawn with it too: ghosts are hidden, so for them the overlay is all there is.