半透明面片或墙壁的实现

using UnityEngine; 

using System.Collections;  

public class example : MonoBehaviour {     

void Update() {         

RaycastHit[] hits;         

hits = Physics.RaycastAll(transform.position, transform.forward, 100.0F);         

int i = 0;         

while (i < hits.Length) {             

RaycastHit hit = hits[i];            

 Renderer renderer = hit.collider.renderer;             

if (renderer) {                 

renderer.material.shader = Shader.Find("Transparent/Diffuse");                

      renderer.material.color = new Color(renderer.material.color.r,renderer.material.color.g,renderer.material.color.b,0.3f);

}            

 i++;        

 }    

   } 

}

绘制被遮挡部分 ZTest Off，  ZTest Greater 绘制未被遮挡部分 ZTest On， ZTest LEqual 效果