Fog Tint is B10G11R11_UFloatPack32. A quad sized to 1e-5 of the centre drew a plateau near 3.2e-5 from 1.75 to 2.1 P and
then zero: a step in the tail the RFloat verify could not see. AmbientFloor is now 2^-15 absolute and the quad ends where
the brightest channel reaches it (1.78 P), so the one step to dark is the format's last value, at most 1.5 floors. The
verify builds its target from the production render texture's descriptor, asserts the format, holds the profile to the
gaussian within the format's 2^-5 step where it is at least 8 floors, and bounds the rim and the step to dark by 2^-14.
Builds; AmbientEdgeVerify passes on Starfire.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ambient Fog Light leaves Zone Brushes (root object, same pose) and Sector Tint.mat moves from
PowerBrush to Brushes/Ambient Brush: brightness falls as exp(-x^2 ln(1/_EdgeBrightness)), x in
units of Zone.PopulatedRadius. ZoneRenderer.FitAmbientLight, called by LoadZone, is the one
writer of the quad's size and _Reach (the radius where it is 1e-5 of the centre). AmbientEdgeVerify
renders the real scene object through that call. Builds in Unity 6000.3.24f1.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
