Overview
You wanted to use our own video resolution but can not choose it in the game settings, in that case this guide is for you
About it
DHEWM3 is a Doom 3 GPL source port, and his goal is to bring DOOM 3 with the help of SDL to all suitable platforms. Now let’s take a look at his features…
- Features:
- 64Bits support.
- SDL for low level OS support, OpenGL and input handling.
- OpenAL for audio output, all OS specific audio backends are gone.
- OpenAL EFX for EAX reverb effects..
- SDL for low level OS support, OpenGL and input handling.
- Better support for widescreen and display resolutions.
- A portable build system based on CMake.
- (Cross) compilation with mingw-w64.
The project is hosted at: [link]
Latest Release: [link]
Downloading
Above i give you a download link for it labeled Latest Release[github.com] so open the link and will look like this. 
Installation
The installation is rather simple after you downloaded the .zip you need to.
- Open the game diretory by right click on it and in the Local files tab click Installation folder.
- Open the zip you downloaded and copy the files from it to the game diretory you opened.
- Rename the dhewm3 to Doom3 and open it on steam.
End
Notes:
- If it’s crashing for you probably because of AMD’s drivers only rename Doom3 to Doom3DeD and the Doom3DeD rename to Doom3 you will swap them got it ? but you need to open with Launch doom 3 Server instead of Play DOOM 3 on steam this can even fix the default game with mods since the catalyst when found the Doom3.exe it start patching it…also it fix the screenshot issue.
- DHEWM3 is incompatible with MODS ! is needed a conversion for it to work !
EXTRAS!
As for extras we have:
Wulfen Textures Pack for Vanilla[drive.google.com]
My things with a .pk3 modpack which includes an Explainable Autoexec…[drive.google.com]