If you are unhappy with the provided skyboxes, you have three main options: You can dynamically change the X and Y rotation of the main camera to see how the entire skybox looks as you look around the (otherwise empty) scene. When you click 'Play', you should now see this skybox appear for this camera, but it won't appear in the editor window. In the Inspector window, click the little circle under the newly created 'skybox' component, or drag your desired skybox material from the Project Window into the custom skybox field.Choose ' Component > Rendering > Skybox' in the menubar.Select the desired camera in the Hierarchy window ('Main Camera' is the default one).If you don't want the skybox appearing in the editor window, or wish different cameras to render different skyboxes, another option in Unity is to add a ' skybox component' to individual cameras. This skybox should now appear in both the editor and game window and is the 'default skybox' for every camera in the scene. Drag 'Sunny 1' (or any other skybox material) from the Project Window into the custom skybox field.Choose Edit>Render Settings from the menu bar.In the newly created project, expand ' Standard Assets > Skyboxes' in the Project window so you can see the skyboxes there.Start a new Unity project, and make sure you tick ' Skyboxes.unityPackage'.To add a Skybox in Unity, the easiest method is to use one of Unity's pre-existing skyboxes and add it to the scene: In any scene on land or water (which is most scenes!), a day-time (blue sky, clouds and sun) or night-time (stars, moons and optional clouds) sky will occupy just over half your box (lets say -3 degrees below horizontal) - hence in many skyboxes the bottom half of front, back, left and right images is often just a shade of blue or green (which should compress nicely). Your six skybox textures don't have to all be the same resolution. although in many games the 'down' image will never get seen, so you may decide to leave this blank or make it 1x1 single-colored image to reduce file size. Typically each of these images is 1024x1024 or 512x512. Within this skybox component you must specify a ' Skybox material' - a special form of material which contains six square textures (six images imported into Unity) in the following order:

The Unity game engine allows you to use a skybox, by adding a ' Skybox component' to the scene and/or individual camera objects.

Free skybox unity