The programm increase the radius of light sources in the game and remove some artifacts in the lighting.
Looking in my archives, I found an old program that improves the lighting system in Doom 3. The program was written by Alexander Smetkin (Saber Interactive. Senior rendering programmer) and was first published on the Doom3.ru forum on 06/25/2008. With this program you can increase the size of the light sources in the game (not brightness) and remove some artifacts in the lighting, due to the fact that when developing the game, the light sources were often intentionally set so that they do not intersect each other, in order to increase performance, in some places these joints are visible. Also, due to the increased size of the light sources in some places it will become lighter, but in general the darkness will not disappear and you will still have to use a flashlight in some places.
Instruction:
- unzip the “maps” folder from pak000.pk4 and place it in the “base” folder.
- unzip the program into the "game" folder (Doom3 \ base \ maps \ game).
- remove the read-only attribute from all files in the game folder.
- run the program, it will create a compile.cfg file with compilation commands for the modified files.
- transfer the compile.cfg file to the "base" folder.
- run the game and type exec compile.cfg in the console.
- the process of recompiling maps will begin, on my Intel Core i3-5005U and 4 Gb RAM this process takes 1.5 hours. After the recompilation is over, you can play.
By default, the program increases the size of light sources by 1.5 times. You can set the parameter through the command line of the required coefficient. for instance
DooM3LightExpansion.exe 1.3 or DooM3LightExpansion.exe 1.7.
Hint: after compilation, you can delete all files from the game folder, except for files with extensions map and proc. Next, archive the game folder in the zip archive and change the extension of this file to pk4. Thus, you can create your own set of maps with new lighting and start it when necessary.
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Thank you so much for sharing this, and for the detailed instructions! The default setting of 1.5 is a bit extreme for my taste, but I ran it at 1.1 and it looks great without illuminating any of the shadows. Resurrection of Evil set at 1.1 absolutely pops and is a little more subtle in most places due to having a lot of ambient light in general.
Doom 3 took an hour and a half to run the program, and RoE took 40 minutes.
I recommend keeping the volume fairly audible while it's running, you'll know when it's done when the menu music starts back up, quite handy! Also, don't try to alt-tab out because it will crash and you'll have to start all over.