Loading wallpapers

Embed a PNG/JPEG, then register it during OnInitializeMelon.

Embed the image

Add Assets/nebula.png and this project entry:

<ItemGroup>
  <EmbeddedResource Include="Assets/nebula.png" LogicalName="MyFirstMod.nebula.png" />
</ItemGroup>

Register during startup

After creating content:

content.RegisterLoadingWallpaper(new LoadingWallpaperDefinition
{
    Id = "nebula",
    TextureResource = "MyFirstMod.nebula.png"
});

Use a unique local ID and the exact embedded resource name. Wallpapers stay client-local and do not need a category.

Each world load selects one image and crops it to fill the screen. Keep important details away from the edges. Invalid images are logged and skipped; no valid images means a black background.

See LoadingWallpaperDefinition for details.