J´ai tester pour vous performance sans compromis.
Creez un fichier autoexec.cfg avec Notepad et entrer ces valeurs, placer votre fichier ds base.

64 Megabyte CG
seta image_downSizeLimit " 256"
seta image_ignoreHighQuality " 1"
seta image_downSizeBumpLimit " 256"
seta image_downSizeSpecularLimit " 64"
seta image_downSizeBump " 1"
seta image_downSizeSpecular " 1"
seta image_downSize " 1"
seta image_forceDownSize " 1"
seta image_anisotropy " 0"
seta image_filter " GL_LINEAR_MIPMAP_NEAREST"

128 Megabyte CG
seta image_downSizeLimit " 512"
seta image_ignoreHighQuality " 1"
seta image_downSizeBumpLimit " 512"
seta image_downSizeSpecularLimit " 64"
seta image_downSizeBump " 1"
seta image_downSizeSpecular " 1"
seta image_downSize " 1"
seta image_forceDownSize " 1"
seta image_anisotropy " 0"
seta image_filter " GL_LINEAR_MIPMAP_NEAREST"