建立項目版本為Unity4.6，改為5.3.4版本，運行項目報如下錯誤：
“BCE0004: Ambiguous reference 'preview': CameraMotionBlurEditor.preview, UnityEditor.Editor.preview.”
修改 preview 為 preview_
var preview_ : SerializedProperty;
preview_ = serObj.FindProperty ("preview");
EditorGUILayout.PropertyField (preview_, new GUIContent("Preview"));
if (preview_.boolValue)