Add a Custom Skybox

This section will go over changing the default Unity Skybox to an HDRI image.

What is a Skybox?

A ‘Skybox’ is a flat 2D image that is applied around your Space.
Note: The Skybox will effect the lighting in your scene so it is best to add this early on.
The result simulates the experience of being in a much larger environment.

How to add a Custom Skybox to your Mona Space.

Learn how to add a Skybox to your build in Unity : Watch Skybox Tutorial here.

For royalty free Skyboxes (HDRI Images), download them here from

  1. 1.
    Download the EXR from the PolyHaven HDRI section (or elsewhere).
  2. 2.
    Save it into your assets folder in your unity build
  3. 3.
    Click on that file in unity, and change the 'Texture Shape > Cube' (in the inspector) and hit apply.
  4. 4.
    Create a new material.
  5. 5.
    Set the Shader (at the top of the inspector) to 'Skybox/Cubemap'
  6. 6.
    Drag your EXR file onto the Cubemap (HDR) slot in the material
  7. 7.
    Drag your material onto the background of the scene and it should update with your skybox!
  8. 8.
    If you want the lighting but want to turn off the material in the scene, you can turn it off at the top left viewport option pulldown.
Tip: If using the Skybox>Panoramic, be sure to uncheck "generate mipmaps" on your image texture settings.