maxRadius property

double maxRadius
final

The largest circle the gather will draw, in pixels at the render resolution.

A bound on the cost rather than on the optics: the formula is happy to ask for a circle a hundred pixels across at f/1.4 with a near focus, and the taps that would need are not there. Clamping shows as a background that stops getting softer, which is the failure worth having.

Implementation

final double maxRadius;