3rd Person Camera help (C#)

Questions & Answers
1

I’m trying to make a 3rd person camera that will move up towards the character instead of going through walls. The code I have works pretty well, except for one thing. I have invisible cubes around the tutorial area that I use to display GUIs when you walk inside them. The problem is that the camera will detect the invisible cubes and move when it shouldn’t. The camera code is here:

using UnityEngine;
using System.Collections;
 
public class CameraCollision : MonoBehaviour {
 
    public float minDistance = 10.0f;
    public float maxDistance = 4.0f;
    public float smooth = 10.0f;
 
    Vector3 line;
    float distance; 
 
    void Awake()
    {
        line = transform.localPosition.normalized;
        distance = transform.localPosition.magnitude;
    }
 
    void Update()
    {
            Vector3 desiredCameraPos = transform.parent.TransformPoint(line * maxDistance );
 
            RaycastHit hit;
            if( Physics.Linecast( transform.parent.position, desiredCameraPos, out hit ) )
            {
                distance = Mathf.Clamp( hit.distance, minDistance, maxDistance );
            }
            else
            {
                distance=maxDistance;
            }
 
            transform.localPosition=Vector3.Lerp(transform.localPosition, line * distance, Time.deltaTime * smooth); 
    }

`

The cubes have no scripts, the GUI is on the character, but they do have a box collider set as a trigger. 
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2

You can try setting up layers so your camera wont collide with those boxes.