-console # : Set to 0 to turn off the pop-up console (default is 1)

-lang file : localization file

-waddir folder : Search this folder for wad files.

-fast : Fast rad

-vismatrix value: Set vismatrix method to normal, sparse or off .

-extra : Improve lighting quality by doing 9 point oversampling

-bounce # : Set number of radiosity bounces

-ambient r g b : Set ambient world light (0.0 to 1.0, r g b)

-limiter # : Set light clipping threshold (-1=None)

-circus : Enable 'circus' mode for locating unlit lightmaps

-nospread : Disable sunlight spread angles for this compile

-nopaque : Disable the opaque zhlt_lightflags for this compile

-smooth # : Set smoothing threshold for blending (in degrees)

-smooth2 # : Set smoothing threshold between different textures

-chop # : Set radiosity patch size for normal textures

-texchop # : Set radiosity patch size for texture light faces

-notexscale : Do not scale radiosity patches with texture scale

-coring # : Set lighting threshold before blackness

-dlight # : Set direct lighting threshold

-nolerp : Disable radiosity interpolation, nearest point instead

-fade # : Set global fade (larger values = shorter lights)

-scale # : Set global light scaling value

-gamma # : Set global gamma value

-sky # : Set ambient sunlight contribution in the shade outside

-lights file : Manually specify a lights.rad file to use

-noskyfix : Disable light_environment being global

-incremental : Use or create an incremental transfer list file

-dump : Dumps light patches to a file for hlrad debugging info

-texdata # : Alter maximum texture memory limit (in kb)

-lightdata # : Alter maximum lighting memory limit (in kb)

-chart : display bsp statitics

-low | -high : run program an altered priority level

-nolog : Do not generate the compile logfiles

-threads # : manually specify the number of threads to run

-estimate : display estimated time during compile

-verbose : compile with verbose messages

-noinfo : Do not show tool configuration information

-dev # : compile with developer message

-colourgamma r g b : Sets different gamma values for r, g, b

-colourscale r g b : Sets different lightscale values for r, g ,b

-colourjitter r g b : Adds noise, independent colours, for dithering

-jitter r g b : Adds noise, monochromatic, for dithering

-customshadowwithbounce : Enables custom shadows with bounce light

-rgbtransfers : Enables RGB Transfers (for custom shadows)

-minlight # : Minimum final light (integer from 0 to 255)

-compress # : compress tranfer ( 0=32bit 1=16bit 2=8bit )

-rgbcompress # : compress rgbtranfer ( 0=96bit 1=48bit 2=32bit 3=24bit )

-softsky # : Smooth skylight.(0=off 1=on)

-depth # : Thickness of translucent objects.

-blockopaque # : Remove the black areas around opaque entities.(0=off 1=on)

-notextures : Don't load textures.

-texreflectgamma # : Gamma that relates reflectivity to texture color bits.

-texreflectscale # : Reflectivity for 255-white texture.

-blur # : Enlarge lightmap sample to blur the lightmap.

-noemitterrange: Don't fix pointy texlights.

-nobleedfix : Don't fix wall bleeding problem for large blur value.

-drawpatch : Export light patch positions to file 'mapname_patch.pts'.

-drawsample x y z r : Export light sample positions in an area to file 'mapname_sample.pts'.

-drawedge : Export smooth edge positions to file 'mapname_edge.pts'.

-drawlerp : Show bounce light triangulation status.

-drawnudge : Show nudged samples.

-drawoverload : Highlight fullbright spots