Rendering – OpenGL

If you’ve selected OpenGL then set it as follows. Although, you should try using the Direct3D renderer before using OpenGL.

Coronas. Set this to True. This is the haze of light that appears around light sources in the game, such as lamps in the game. Set it to False if you need extra performance (very slight at that).

DetailTextures. A detail texture is a very small, fine pattern which is faded in as you approach a surface, for example wood grain, or imperfections in stone. Set this to True for improved visual quality, although it may cause a performance hit on some graphics cards.

Set it to False for increased performance. You can use the LodPercentage setting to adjust the range at which detail textures are applied.

HighDetailActors. Set this to True for better visuals. Setting it to False will improve performance.

ShinySurfaces. Shiny surfaces are the reflective surfaces in the game, e.g. on some floors you can see your (& others) reflections. Setting it to False will improve your frame rate in such areas. I’d recommend setting it to False.

VolumetricLighting. Set this to True for better visuals (effects like fog), although with lower performance. Setting this to False will result in a big frame rate increase. On most graphics cards that have trouble running Unreal setting this to False may mean the difference between a playable & an unplayable game.

You'll want to do some more advanced editing, go into the Unreal/System folder & open up OpenGlDrv.ini.

·        Change 1 to 0 in DoPrecache=1 if you want to disable precaching in OpenGL. This will speed up the loading of levels, although may reduce performance.

·        If you encounter any visual problems try changing 1 to 0 in UseMultiTexture=1. This can adversely affect performance however.

·        Changing 1 to 0 in UseZTrick=1 can fix z-buffer related problems.

Rendering - Software

If you’ve selected the Software renderer then set it as follows.

If you really must use the Software renderer then you really should set everything to False, with the exception of Fast translucency. This will ensure software rendering is running optimally.

Make sure that SlowVideoBuffering is set to True, in the Display section of the Advanced options menu. This can also further improve performance.

Also set the game to run in 32-bit colour, this gives optimal performance in Software rendering. This is not the case with hardware rendering modes though.