function Update () {
var hits : RaycastHit[];
hits = Physics.RaycastAll (transform.position, transform.forward, 100.0);

// Change the material of all hit colliders
// to use a transparent Shader
for (var i = 0;i < hits.Length; i++) {
var hit : RaycastHit = hits[i];
var renderer = hit.collider.renderer;
if (renderer) {
renderer.material.shader = Shader.Find("Transparent/Diffuse");
renderer.material.color.a = 0.3;
}
}
}

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];
System.Object renderer = hit.collider.renderer;
if (renderer) {
renderer.material.shader = Shader.Find("Transparent/Diffuse");
renderer.material.color.a = 0.3F;
}
i++;
}
}
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

def Update():
hits as (RaycastHit)
hits = Physics.RaycastAll(transform.position, transform.forward, 100.0F)
i as int = 0
while i < hits.Length:
hit as RaycastHit = hits[i]
renderer as System.Object = hit.collider.renderer
if renderer:
renderer.material.shader = Shader.Find('Transparent/Diffuse')
renderer.material.color.a = 0.3F
i++