Testing jpeg cardboard box background in Rhythm Rally

Assets/Scripts/Common/Billboard.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace RhythmHeavenMania.Common
+{
+    public class Billboard : MonoBehaviour
+    {
+        public float fixedSize = 0.03f;
+        public bool constantScale = false;
+        private Camera cam;
+
+        private void Start()
+        {
+            cam = GameManager.instance.GameCamera;    
+        }
+
+        private void LateUpdate()
+        {
+            this.transform.rotation = cam.transform.rotation;
+
+            if (constantScale)
+            {
+                var distance = (cam.transform.position - this.transform.position).magnitude;
+                var size = distance * fixedSize * cam.fieldOfView;
+                this.transform.localScale = Vector3.one * size;
+                transform.forward = transform.position - cam.transform.position;
+            }
+        }
+    }
+}

Assets/Scripts/Common/Billboard.cs.meta

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+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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