Where the 512 px cap held the light short of half a level, it dropped to 0
in one pixel: a ring 512 px inside a deep pane (46 levels at depth 300,
splay 1, 200%). The falloff now reaches 0 at the reach. Where the cap
doesn't bite this moves the light by at most half a level.
Cut tests now also cover rounded corners and a look under the cap.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
RealtaNuaandClaude Opus 5.5