How to keep an object as "visible" when partially obscured by obstacle?

[vocal flicker]

Whoops

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class FieldOfView : MonoBehaviour
{
    public float viewRadius;
    [Range(0,360)]
    public float viewAngle;

    public LayerMask targetMask;
    public LayerMask obstacleMask;
    public Camera cam;
    public List<Transform> visibleTargets = new List<Transform>();
    private bool IsVisible(Transform target)
    {
        Plane[] planes = GeometryUtility.CalculateFrustumPlanes(cam);
        Vector3 dir = target.position - cam.transform.position;
        dir = dir.normalized;
        if (GeometryUtility.TestPlanesAABB(planes , target.GetComponent<Collider>().bounds))
            return true;
        else
            return false;
    }

    void FindVisibleTargets()
    {
        for(int i = 0; i < visibleTargets.Count; i++) {
            visibleTargets[i].GetComponent<Renderer>().material.SetColor("_Color", Color.red);
        }
        visibleTargets.Clear();
        Collider[] targetsInViewRadius = Physics.OverlapSphere(transform.position, viewRadius, targetMask);

        for(int i = 0; i < targetsInViewRadius.Length; i++) {
            Transform target = targetsInViewRadius[i].transform;
            Vector3 dirToTarget = (target.position - transform.position).normalized;
            
            
            if(IsVisible(target)){
                float dstToTarget = Vector3.Distance(transform.position, target.position);
                if(!Physics.Raycast(transform.position, dirToTarget, dstToTarget, obstacleMask) || target.GetComponent<Renderer>().isVisible) {
                    visibleTargets.Add(target);
                    target.GetComponent<Renderer>().material.SetColor("_Color", Color.black);
                }
            }
        }
    }
    void Start()
    {
         
    }

    // Update is called once per frame
    void Update()
    {
        FindVisibleTargets();
    }
}

Currently this code works except for when the objects are peaking out the sides

Ex:

[ancient lava]

The only realistic option is:

if(!Physics.Raycast(transform.position, dirToTarget, dstToTarget, obstacleMask)```
Do more raycasts

right now you're only raycasting to the object's pivot

you'll want to do more samples than that

for example raycast to the corners

see if you can see them

[vocal flicker]

Okay that makes sense

I'll go figure out how to raycast to corners

[ancient lava]

I recommend Physics.Linecast for this - it's simpler for this use case

[vocal flicker]

Over the original raycast as well or just the corners?

[ancient lava]

up to you

whatever you feel is a good enough sample to decide that if none of those things are visible, the object is not visible

[vocal flicker]

Thanks this worked!