Engine.ReflectionDistance # (replace # with distance you want reflections in water and mirrors to be visible. Input no parameter to see how large current value is, then adjust accordingly.)
Engine.nearplane # (original value: 3, set to higher but not too high - this improves rendering nearby you, causing the "smoothing out" to occur further away. For this to work, you'll need to move to the next cell i.e. where the rotating disk loading occurs.)
Engine.farplane # (Original value: 1200.00, set to higher to see further in the distance).
Engine.drawdland # (replace # with 0 or 1, this works exactly as in TW1, removing all distance rendering, vastly improving performance. However, if your farplane is set lower, you'll see blue sky edges where the horizon or nearby objects should be.)
Engine.ParalaxOnTerrain # (replace # with 0 or 1, removes/turns back on parallax mapping for non-vertical surfaces, useful if you're running ATI card and have no AF options. This will also boost performance for some users. Turning this option off will allow engine to use AF forced on your GPU @ driver level.)
Engine.GrassUserDistance # (replace # with 0-5 value, 0 will completely disable grass, 1.5 and above is suggested as beneficial)
Engine.MBlurIntensity # (check current value -- 8 -- by inputting without any parameter. Disable or lower if motion blur is too high for you. The setting doesn't seem to do much.)
Engine.Mblurscale # (check current value -- 8 -- by inputting without any paramter. Disable or lower if motion blur is too high for you. The setting doesn't seem to do much.)
YoungNeil1 reports a good way to remove blurriness in some textures as well:
engine.edgeaablend # (replace # with 0 or 1, removes the unnecessary blurring out of many textures - if you want to still enjoy the performance-lossless AA, use values between 0.7 and 0.9).
Shmoodoo reports a good way to reduce glow/bloom without losing the overall picture enhancement from HDR (in engine.hdr 0 command):
Engine.BloomMultiplier # (any number from 0 to 1, 0 turns Bloom off completely. Yes, this will make savannah less overpowering!)