- Create your texture with power of two sizes, for example 1024x1024, or 1024x512.
- Name it "Screenshot" and save it as .tga image. (It must always be named Screenshot !)
- Import the image into the mylevel package and after its imported, click on the image.
- In the main editor, go to View => Level properties => LevelInfo => Screenshot; Now click on Use.
If you want to add a loading image to older maps, without altering them;
You can create a Textures file named LevelScreenshots.utx and include the loading image, named with each map name.
You can download an example file from here: http://www.moddb.com/mods/bladein/addon ... enshots-v2
This file works locally. It is never requested by the server. Users should have it in their Textures folder.