When upgrading your unreal drivers take note to remove the following Obsolete settings
In UnrealTournament.ini file with OpenGL renderer and Direct3D9 renderer
Obsolete settings
Obsolete settings present in older versions of the renderer.
AlwaysMipmap - [True/False]
Can make the renderer always generates mipmaps for textures that are not supplied with them. But, it's always set to 0 by the initialization code (has been this was for a long time), so changing the value of this setting should make no difference.
AutoGenerateMipmaps - [True/False]
Enables the use of the GL_SGIS_generate_mipmap extension for automatic mipmap generation. It is recommended that this setting be disabled as there are far too many video drivers that have unstable, slow, and/or broken support for this extension.
NoMaskedS3TC - [True/False]
This is a debug option designed to emulate the behavior of older renderers. If set to True, it will prevent masking from working on masked S3TC textures.
RequestHighResolutionZ - [True/False]
Allows a high resolution Z buffer to be requested when running in a 16-bit color mode. It's a good idea to enable this option if running in 16-bit color because rendering problems can occur if a 16-bit Z buffer is used. Note that not all video cards support Z and color buffers of dissimilar bit depths.
AAFilterHint - [Integer]
Can be used to enable Quincunx AA on NVIDIA video cards that support it. Set to 2 to enable this mode.
MaxLogUOverV - [Integer]
Set to 8.
MaxLogVOverU - [Integer]
Set to 8.
BufferClippedActorTris - [True/False]
Alters how certain actor polygons are handled, some of which happen to be clipped by higher-level code. It's a tradeoff and it is unlikely to make much of a difference either way.
UseDetailAlpha - [True/False]
Must be enabled for proper detail texture support.