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

Softness of directional light's soft shadows.

See Also: shadows, shadowSoftnessFade properties.
	// make light's shadows very soft
	light.shadowSoftness = 8.0;
using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        light.shadowSoftness = 8.0F;
    }
}
import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		light.shadowSoftness = 8.0F