Type Alias: FadeMode

type FadeMode = "cross" | "in" | "out" | "through";

Controls how the source and destination snapshots fade against each other during a flight.

• "cross" (default): source fades 1 -> 0 while destination fades 0 -> 1 linearly across the full duration.
• "in": source stays opaque (1) while destination fades 0 -> 1 on top.
• "out": destination stays opaque (1) underneath while source fades 1 -> 0.
• "through": Material fade-through curve. Source fades out over the first 35% of progress, followed by a 5% gap, then destination fades in over the remaining 60%.