Environment color grade (sRGB multiplier 0..1) for point clouds / gaussian splats: a day/night
exposure (bright by day, a dim cool floor at night) with a warm golden-hour tint. Multiply a
layer's display color by this so it grades with the sun even though it carries no normals. White
(1,1,1) above the horizon's upper stops → no change by day.
Parameters
altitudeDeg: number
Solar altitude above the horizon, degrees (negative below it).
Returns Vec3
A Vec3 sRGB (display-space) multiplier in 0..1; (1,1,1) by day.
Environment color grade (sRGB multiplier 0..1) for point clouds / gaussian splats: a day/night exposure (bright by day, a dim cool floor at night) with a warm golden-hour tint. Multiply a layer's display color by this so it grades with the sun even though it carries no normals. White (1,1,1) above the horizon's upper stops → no change by day.