shadowAngle

uniform float shadowAngle;

This value is similar to sunAngle, except it takes its value from the highest celestial body. During the day, the value is equivalent to sunAngle, and during the night it ranges from 0.0 for sunset, 0.25 for midnight, and approaches 0.5 as sunrise approaches. Therefore, the value of shadowAngle ranges between 0.0 and 0.5.