Попробуй это (сохрани в файл и подгрузи через exec):
set D3DDrv.D3DRenderDevice DetailTextures False
set D3DDrv.D3DRenderDevice HighDetailActors False
set D3DDrv.D3DRenderDevice SuperHighDetailActors False
set D3DDrv.D3DRenderDevice UsePrecaching True
set D3DDrv.D3DRenderDevice UseTrilinear False
set D3DDrv.D3DRenderDevice AdapterNumber -1
set D3DDrv.D3DRenderDevice ReduceMouseLag True
set D3DDrv.D3DRenderDevice UseTripleBuffering True
set D3DDrv.D3DRenderDevice UseHardwareTL True
set D3DDrv.D3DRenderDevice UseHardwareVS True
set D3DDrv.D3DRenderDevice UseCubemaps True
set D3DDrv.D3DRenderDevice DesiredRefreshRate 60
set D3DDrv.D3DRenderDevice UseCompressedLightmaps True
set D3DDrv.D3DRenderDevice UseStencil False
set D3DDrv.D3DRenderDevice Use16bit True
set D3DDrv.D3DRenderDevice Use16bitTextures False
set D3DDrv.D3DRenderDevice MaxPixelShaderVersion 255
set D3DDrv.D3DRenderDevice UseVSync False
set D3DDrv.D3DRenderDevice LevelOfAnisotropy 1
set D3DDrv.D3DRenderDevice UseNPatches False
set D3DDrv.D3DRenderDevice TesselationFactor 1.000000
set D3DDrv.D3DRenderDevice CheckForOverflow False
set D3DDrv.D3DRenderDevice AvoidHitches False
set D3DDrv.D3DRenderDevice DecompressTextures False
set D3DDrv.D3DRenderDevice UseXBoxFSAA False
set D3DDrv.D3DRenderDevice DescFlags 0
set OpenGLDrv.OpenGLRenderDevice DetailTextures False
set OpenGLDrv.OpenGLRenderDevice HighDetailActors False
set OpenGLDrv.OpenGLRenderDevice SuperHighDetailActors False
set OpenGLDrv.OpenGLRenderDevice UsePrecaching True
set OpenGLDrv.OpenGLRenderDevice UseCompressedLightmaps True
set OpenGLDrv.OpenGLRenderDevice UseTrilinear True
set OpenGLDrv.OpenGLRenderDevice UseStencil False
set OpenGLDrv.OpenGLRenderDevice MaxTextureUnits 8
set OpenGLDrv.OpenGLRenderDevice VARSiz 32
set OpenGLDrv.OpenGLRenderDevice ReduceMouseLag False
set Engine.NullRenderDevice DetailTextures False
set Engine.NullRenderDevice HighDetailActors False
set Engine.NullRenderDevice SuperHighDetailActors False
set Engine.NullRenderDevice UsePrecaching True
set Engine.NullRenderDevice UseCompressedLightmaps True
set Engine.NullRenderDevice UseStencil False
P.S.
Сам не проверял
это со старых инишек ХАNa под UT2003 (у него текстуры как раз были размыты) по идее должно подойти и под 2004