1. Enable Developer Mode#

• Create a Meta Developer Account in Meta.
• Turn on Developer Mode in the Meta Horizon app

2. Setting Up Unity for Oculus Development#

• Go to Edit → Project Settings → XR Plug-in Management, enable Oculus for both Windows and Android.
• Install Oculus Integration from the Unity Asset Store.
• Run Tools → Project Setup Tool → Fix All & Apply All (this actually fixed more problems than I expected).
• Switch platform in File → Build Settings → Android.

💡 Why: Quest 3 runs Android. Without the XR plugin + Oculus package, Unity can’t talk to the headset — I learned this the hard way when nothing showed up in my first test build.

Method 1: AirLink (Wireless)#

convenient, but slightly blurry visuals and longer builds — kind of frustrating when you’re in the zone

• Turn on Developer settings in Quest (Settings → Beta)
• Connect Quest to PC via AirLink
• Run from Unity. (May cause longer load times)

Method 2 (Recommended): USB-C (Wired)#

more stable, faster builds

• Connect Quest via USB-C cable
• In Unity, go to files → build settings and click Build and Run.

1. Camera Configuration#

• Delete the default Main Camera.
• Add OVRCameraRig prefab.
• In OVRManager (inside OVRCameraRig), set:
  • Hand Tracking Support → “Controllers and Hands”
  • Passthrough Support → “Supported”
  • Enable Passthrough → Checked
• Add OVRControllerPrefab and OVRHandPrefab to Right/LeftHandAnchor.
• For RightHandPrefab, change to hand right in components: OVR Hand, OVR Skeleton and OVR Mesh comp.

💡 Why: The default Main Camera does not support VR tracking or Passthrough. So we have to replce the deafault Main Camera into OVRCameraRig which handels stero rendering, tracking, and device input. Changing settings in OVRManager enables both controllers and hands in MR while turing on Passthrough. OVRControllerPrefab and OVRHandPrefab provide controller/hand models so you can actually see and interact with them in MR.

2. Adding the Passthrough Layer#

• Create an empty object Passthrough.
• Reset its Transform.
• Add OVR Passthrough Layer component inside Passthrough.
• Change Placement → Underlay.

💡 Why: Underlay makes the real-world view sit behind virtual objects, avoiding weird overlaps.

• In CenterEyeAnchor, set Clear Flags to Solid Color and backaground to black.
• Create 3D object Cube in Hierarchy and adjust the position as needed.

💡 Why: Prevents Unity’s default skybox or other background from showing through. A quick test object to confirm Passthrough + rendering are working.

1.OVR Settings#

• Add OVRSceneManager.
  1. Assign Plane (OVR Scene Anchor) to Plane Prefab and Volume (OVR Scene Anchor) to Volume Prefab (plane mesh & volume).
  2. Assign Invisible Plane (OVR Scene Anchor) to Plane Prefab and Invisible Volume (OVR Scene Anchor) to Volume Prefab (plane mesh & volume). — recommended.
• In OVRCameraRig, change to Supported in scene support.

💡 Why: Plane and Volume in OVRSceneManager enables scene understanding so your virtual objects can collide with real-world walls/floors. Invisible prefabs keep the real-world mesh hidden but functional. Without enabling scene support in OVRCameraRig, the headset won’t actually run scene scanning.

1. Ball Interaction Script#

• Go RightHandAnchor → Add Component and create a BallInteraction component.
• Copy and paste the below script.

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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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public class BallInteraction : MonoBehaviour
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{
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    public GameObject prefab;
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    public float spawnSpeed = 5;
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    void Update()
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    {
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        if (OVRInput.GetDown(OVRInput.Button.SecondaryHandTrigger))
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        {
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            GameObject Ball = Instantiate(prefab, transform.position, Quaternion.identity);
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            Rigidbody BallRB = Ball.GetComponent<Rigidbody>();
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            BallRB.velocity = transform.forward * spawnSpeed;
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        }
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    }
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}

💡 Why: This script lets you spawn and throw balls from your right hand trigger.

2. Physics#

• Create a Physic Material Bounce (Bounciness=1) in Assets folder.
• Create a 3D object sphere Bounce Sphere (scale 0.1, 0.1, 0.1) and add Rigidbody.
• Go Bounce Sphere → Sphere Collider → Material and assign Bounce.
• Add Bounce Sphere in Asset folder and remove it in Sample Scene.
• Go RightHandAnchor → Ball Interaction → Prefab and assign Bounce Sphere.

💡 Why: The Rigidbody and Physics Material make the ball actually bounce instead of rolling lifelessly, and saving it as a prefab keeps spawning clean and reusable.

• Go Edit → Project Settings → Time and set Fixed TImeStep = 0.0083333.

💡 Why: Matching Unity’s physics update to 90 Hz reduces jitter in MR, and linking the prefab ensures that pressing the trigger spawns bouncy balls.