Taking screenshots (without using a port)

How to take screenshots in The Ultimate Doom using the Steam interface without using a port.

Configuring DosBox to use OpenGL

In order to take screenshots via Steam (default key is F12), you have to enable the Steam overlay for DosBox. This is done by changing the output to OpenGL. In order to do this follow these steps:

1. Navigate to your The Ultimate Doom folder. The default path is "C:\Program Files (x86)\Steam\SteamApps\common\Ultimate Doom".
2. Open the "base" suibfolder.
3. Edit "ultimatem.conf" with a text editor.
4. Search for the line: output=surface
and change it to: output=opengl
5. Save the changes.

Make sure that in the properties of The Ultimate Doom in Steam the option "Enable the Steam Overlay while in-game" is enabled.

Now you can take screenshots via the Steam interface and upload them after you stopped playing.

Extra note: If the display after the change doesn't fill the whole screen anymore (huge black border), please adjust the following lines to these values:

[sdl]
fullresolution=1280x800

[Alby]

If you browse for Doom II guides there are multiple guides that apply a fix. They caution that It violates the Steam Terms of Service though, as it involves modifying Steam files.

[TheCyberDruid]

I can't get it to work in Doom 2, so if anybody figures out how to do it please let me know.