title: Unity : project works in editor but black screen when build
body: <p>I'm on a project using Unity 2019 LTS and some unity SDK / package:</p>
  <ul>
  <li>Mapbox SDK</li>
  <li>DreamWorld SDK (the SDK of my AR headset)</li>
  <li>some other default AR packages (Foundation, Subsystem)</li>
  </ul>
  <p>I would like to reused the Mapbox World-scale AR example in order to implement the possibility to move the scene according my AR headset position.</p>
  <p>To do so, I removed the default main camera of the example (in AR Root) and added instead a the camera for my headset, as explained in the headset's docs (<a href="https://www.dreamworldvision.com/developers" rel="nofollow noreferrer">DW Developer Kit SDK</a>).</p>
  <p>Here are some pictures of what I've done:</p>
  <p><img src="https://i.stack.imgur.com/eE75z.png" alt="enter image description here" /></p>
  <p><img src="https://i.stack.imgur.com/YVg8A.png" alt="enter image description here" /></p>
  <p><img src="https://i.stack.imgur.com/DfTen.png" alt="enter image description here" /></p>
  <p><img src="https://i.stack.imgur.com/JTrXW.png" alt="enter image description here" /></p>
  <p>No here's my problem: when I run the project in the editor with the player mode, all works perfectly fine and I see the camera rotation following the position of my AR headset.</p>
  <p>Therefore, if I try to build the project, I cannot the see the &quot;view&quot; of the camera. I know that the project run because I still can see the overlay menu provides by the Mapbox World-scale example but not my camera.</p>
  <p>Editor :</p>
  <p><img src="https://i.stack.imgur.com/X7YUx.png" alt="enter image description here" /></p>
  <p>Build :</p>
  <p><img src="https://i.stack.imgur.com/3Dppb.png" alt="enter image description here" /></p>
  <p>I searched online to find some solution to my issue but I only found some answer about building to Android and iPhone while I trying to build on my laptop.</p>
  <p>The fact I see a black screen (and the overlay) seems to me that Unity cannot find a camera to show me the scene.</p>
  <p>I just started using Unity, so it is possible that I missed an obvious thing but I don't know what.</p>
  <p>If someone as any idea of what my problem is...</p>