DOOM 3 BFG Edition (2012): AutoExec.cfg

com_allowconsole 1

seta r_mode -1
seta r_aspectRatio 1 //(0 = 4:3, 1 = 16:9, 2 = 16:10)
seta r_customHeight 1080 //(Your screen height)
seta r_customWidth 1920 //(Your screen width)
set image_anisotropy "8"

set image_downSizeLimit "1024"
set image_ignoreHighQuality "0"
set image_downSizeBumpLimit "1024"
set image_downSizeSpecularLimit "64"
set image_downSizeBump "0"
set image_downSizeSpecular "0"
set image_useCache "1"
set image_cacheMegs "512"
set image_cacheMinK "50240"
set image_usePrecompressedTextures "0"
set image_useNormalCompression "0"
set image_useAllFormats "1"
set image_useCompression "0"
set image_roundDown "0"
set image_forceDownSize "0"
set image_downSize "0"
set image_lodbias "0"

set g_nightmare "1"
set g_roeNightmare "1"
set g_leNightmare "1"