this post was submitted on 19 Jul 2023
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Doom3 is one of the landmark games for GPU-based shading - it made a lot of use of GPU stencilling, multiple texture targets, computation in shaders; it massively advanced the state-of-the art in forward rendering. So much so that any modern GPU is very well optimised for 'the things that Doom 3 wants to do', because that's what every game that wants advanced lighting wants to do. The problem then for using it for any kind of benchmarking is that basically any modern card will output Doom3 at 200fps at 4k and still be in power saving mode. It would be like trying to stress-test a CPU with Wolfenstein 3D - the state of the art has long moved past that, you can't use the results of that to tell anything apart any more.
Trying to get Doom3 to render in 16:9 resolutions tho, rather than 4:3? Now that's stressful...
I believe the real issue with Doom3 is rending more frames than 60 (per second). It results in game breaking bugs.
For anyone looking for a modern Doom 3 experience, use "dhewm3".