A recreation of the bts_custom_cubemap skybox left unused in the files of Portal.
Information
For those who are unaware, bts_custom_cubemap is a skybox left unused in the files of Portal that was likely used for testing custom cubemaps. It depicts a large metal room with tunnels emitting orange light. This Bonus Map for Portal aims to recreate it as closely as possible.
Screenshots
![Wallpaper material?]()
![give weapon_portalgun]()
![I bet it's made of glass.]()
Installation Instructions
- Open the "portal" folder in the Portal installation directory (Usually it's C:/Program Files (x86)/Steam/steamapps/common/Portal/portal).
- Open the "custom" folder (If there is none, create a folder and name it "custom").
- Extract the folder inside this zip file into the custom folder.
- Launch Portal.
- The map should be an option in the Bonus Maps menu.
