Portal rendering 1/2 done

Assets/Scripts/Portals/PortalCamera.cs

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+using UnityEngine;
+
+[RequireComponent(typeof(Camera))]
+public class PortalCamera : MonoBehaviour
+{
+    [Header("Components")]
+    [SerializeField] Shader m_Shader;
+
+    // Private members //
+
+    PortalManager m_DisplayPortal;
+    PortalManager m_CapturePortal;
+
+    RenderTexture m_RenderTexture;
+    Material m_RenderMaterial;
+
+    Camera m_Camera;
+
+    // Initialistion function for the camera
+    public void InitCamera(MeshRenderer renderer, PortalManager creator)
+    {
+        //
+        m_CapturePortal = creator.Linked();
+        m_DisplayPortal = creator;
+
+        // Gets the camera from the component
+        m_Camera = gameObject.GetComponent<Camera>();
+
+        // Creates the render texture
+        RenderTextureDescriptor descriptor = new(Screen.width, Screen.height);
+        m_RenderTexture = new RenderTexture(descriptor);
+
+        // Creates a material from the Cutout shader
+        // Needs to be created via code as all the materials have different settings
+        m_RenderMaterial = new Material(m_Shader);
+
+        // Links the camera to the mesh renderer
+        m_Camera.targetTexture = m_RenderTexture; // Sets it's camera to display to the render texture instead of the screen
+        m_RenderMaterial.mainTexture = m_RenderTexture; // Sets the material to use the render texture as it's texture
+        renderer.material = m_RenderMaterial; // Set's the renderer to use the material
+    }
+
+    // Update is called every frame
+    void Update()
+    {
+        // Calculates the player distance from where the portal will be rendererd
+        Vector3 offset = CameraController.Instance().transform.position - m_DisplayPortal.pos;
+        transform.parent.position = m_CapturePortal.TranslateOffset(offset);
+    }
+}

Assets/Scripts/Portals/PortalCamera.cs.meta

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Assets/Scripts/Portals/PortalManager.cs

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+using System.ComponentModel;
+using UnityEngine;
+
+public class PortalManager : MonoBehaviour
+{
+    [Header("References")]
+    [SerializeField] GameObject m_OtherPortal;
+
+    [Header("Set References")]
+    [SerializeField] GameObject m_CameraPrefab;
+    [SerializeField] MeshRenderer m_PortalRenderer;
+    [SerializeField] Transform m_CapturePoint;
+
+    PortalManager m_OtherManager;
+    PortalCamera m_PortalCamera;
+
+    public PortalManager Linked() => m_OtherManager;
+
+    public Vector3 pos => transform.parent.position;
+    public Quaternion rot => transform.parent.rotation;
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        // Validates that it is a portal
+        m_OtherManager = m_OtherPortal.GetComponentInChildren<PortalManager>();
+        if (m_OtherManager == null)
+        {
+            Debug.LogError("OtherPortal was not valid portal");
+            return;
+        }
+
+        // Creates the camera in top-level heirachry and stores the PortalCamera script
+        GameObject cam = Instantiate(m_CameraPrefab, transform.root.parent);
+        m_PortalCamera = cam.GetComponentInChildren<PortalCamera>();
+
+        // Initialises the camera so it renders to the portal and not the screen
+        m_PortalCamera.InitCamera(m_PortalRenderer, this);
+    }
+    public Vector3 TranslateOffset(Vector3 offset)
+    {
+        m_CapturePoint.localPosition = offset;
+        return m_CapturePoint.position;
+    }
+}

Assets/Scripts/Portals/PortalManager.cs.meta

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