edgeAbsorption property

double edgeAbsorption
final

Meniscus darkening strength at the glass rim, from 0 to 1.

Physical glass is thicker at the curved rim (the meniscus). Light traversing more material loses energy, making the refracted scene subtly darker at the edge zone. The bright Fresnel and specular rim highlights then sit on top of this dark band, creating the visual depth that distinguishes real glass from a simple blur overlay.

  • 0.0 — no darkening (default; matches iOS 26 visual baseline)
  • 0.12 — subtle physical darkening (dark-mode depth effect)
  • 0.3 — pronounced rim darkening (thick or frosted glass look)

Implementation

final double edgeAbsorption;