It fixes some transparent areas in the Virtual Cockpit and Cabin. Download SP1a for FSX Here (12.4 MB) Model Updates for FSX version (27 June, 2008) If you have the FSX CD ROM version, or you just have SP1, this update is required.Skyboxes are textures used in maps to expand the appearance of the environment.
This article is a list of skyboxes found in Team Fortress 2.