Light.shadowSoftnessFade
var shadowSoftnessFade: float;
float shadowSoftnessFade;
shadowSoftnessFade as float
Description

Fadeout speed of directional light's soft shadows.

See Also: shadows, shadowSoftness properties.
	// make light's shadow softness fade out really fast
	light.shadowSoftnessFade = 0.3;
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        light.shadowSoftnessFade = 0.3F;
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		light.shadowSoftnessFade = 0.3F