Possible Solution Number 1:
If you have a semi-modern to modern Nvidia Card I have found that this fix (found on the steam forums) should work 100% in ensuring that your textures and shading work fine and do not appear black like many people have had happen. Firstly, you will need a program such as Notepad ++ so you can open the cfg file. Once you have Notepad ++ installed, go to "C:\Program Files (x86)\Steam\steamapps\common\Quake 4\q4base\Quake4Config.cfg" and overwrite these values:
seta image_ignoreHighQuality "0"
seta image_cacheMegs "512"
seta image_downSize "0"
seta image_downSizeBump "0"
seta image_downSizeSpecular "0"
This will fix the textures. Be sure to meddle with nothing but the aforementioned, there will be other seta image files that that correlate with these but only edit the aforementioned.
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Possible Solution Number 2:
"C:\Program Files (x86)\Steam\steamapps\common\Quake 4\q4base\Quake4Config.cfg"
Edit the following lines:
seta image_downSize "0"
seta image_downSizeBump "0"
seta image_downSizeSpecular "0"
seta image_filter "GL_LINEAR_MIPMAP_LINEAR"
seta image_ignoreHighQuality "0"
seta image_useCompression "0"
seta image_useNormalCompression "0"
seta r_renderer "best"
And Save
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Possible Solution Number 3:
"C:\Program Files (x86)\Steam\steamapps\common\Quake 4\q4base\Quake4Config.cfg"
Change the following seta to what you see below and save.
seta r_skipSky "0"
seta r_forceAmbient "0"
seta r_debugArrowStep "120"
seta r_debugLineWidth "1"
seta r_debugLineDepthTest "0"
seta r_forceLoadImages "0"
seta r_shadows "1"
seta r_useSMP "1"
seta r_skipBump "0"
seta r_skipSpecular "0"
seta r_skipNewAmbient "0"
seta r_renderer "best"
seta r_ignoreHWGamma "0"
seta r_brightness "1"
seta r_gamma "1"
seta r_swapInterval "0"
seta r_useIndexBuffers "0"
seta r_customHeight "486"
seta r_customWidth "720"
seta r_fullscreen "1"
seta r_displayRefresh "0"
seta r_mode "7"
seta r_aspectRatio "0"
seta r_alphaToCoverage "1"
seta r_multiSamples "2"
seta image_downSizeLimit "2048"
seta image_ignoreHighQuality "0"
seta image_downSizeBumpLimit "2048"
seta image_downSizeSpecularLimit "2048"
seta image_downSizeBump "0"
seta image_downSizeSpecular "0"
seta image_usePrecompressedTextures "1"
seta image_useNormalCompressionLoadDDSForPal "1"
seta image_useNormalCompression "0"
seta image_useAllFormats "1"
seta image_useCompression "0"
seta image_downSize "0"
seta image_lodbias "0"
seta image_anisotropy "8"
seta image_filter "GL_LINEAR_MIPMAP_LINEAR"
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I have compiled these from various sites over the years and just recently found them on an old Word Doc. I hope that there possible fixes help the community.
