unity3d 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

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