6.3 Graphics
As a general rule, the left most buttons are lower detail/faster and right most or higher detail/slower
User LOD - Users view level of detail
Lower = Faster (Rec: 1.0)
Dust LOD - Dust/Smoke level of detail
Lower = Faster (Rec: 0.8 )
Mirror LOD - Level of detail in rear view mirror
Lower = Faster (Rec: 0.1)
Screen width affects LOD - LOD increases as resolution increases above 1024x768 or LOD decreases as res decreases below 1024x768.
Res lower than 1024, On = Faster
Res set at 1024 = No difference to speed or quality
Res higher than 1024, Off = Faster
Mips Bias - Mip Mapping prevents pixel granularity when approaching a texture by rendering it several times at differing resolutions. As the viewpoint approaches the texture, the texture is scaled up, until a certain threshold, when the rendering engine loads the next higher resolution texture.
Higher = Faster (Rec: -2.0 - Best soft/clear balance anyway right?)
Mirrors Mode - [Off, Real, Virtual]- Turns mirrors off, puts them in the cockpit (kinda out of site) or locates them at the top of your screen. (Shift M to turn on and off in game)
Off = Fastest (Rec: Off - Look behind or turn on in game when needed)
Clocks Mode - [Off, Real, Virtual]- Turns clocks off, puts them in the cockpit (on the dash) or locates them at the sides of your screen. (Shift F to turn on and off in game)
Off = Fastest - Rec: Virtual
Shadow type - [Off, Low, High]- Type of shadow underneath cars
Lower = Faster (Rec: Low Res)
Simple wheels - [Off, Mirror, All]- Draws a simple wheel polygon shape nowhere, just in mirrors, or everywhere.
All = Faster (Rec: Mirror)
Disable trees - [Off, Mirror, All]- Draws trees everywhere, just in mirrors, or nowhere.
All = Faster (Rec: Mirror)
Disable flags - [Off, Mirror, All] - Draws flags everywhere, just in mirrors, or nowhere.
All = Faster (Rec: Mirror)
Simple Car - [Off, Mirror, All] - Draws simple car nowhere, just in mirrors, or everywhere.
All = Faster (Rec: Mirror)
Simple Track - [Off, On] - Draws simple track nowhere or everywhere.
On = Faster (Rec: Off)
Highlights on wheels - Light reflections on wheel rims
Off = Faster (Rec: On)
Enable dither - Dithers shading of textures, visually apparent at 16-bit. Scawen says dither is very efficient so running 16 bit with dither on should be quicker and visually imperceptible to running 32 bit with dither off. Personnally I don't notice any FPS difference between 32 and 16 so I just stick to 32 with dither off.
16/32:Off = Slightly Faster (Rec: 16bit:On, 32bit:Off)
Enable Mip filter - Enables filtering (bilinear? trilinear? anisotripic?) which blends the MIP stages together to smooth out the transitions between each one.
Off = Faster (Rec: On)
Use 2X textures - Modern card feature so that in brightly sunlit areas its textures are nicely saturated. This should be On but some cards have a bug and fail to draw untextured surfaces at 2X intensity.
On/Off = No speed difference (Rec: On)
Use multitexturing - Allows modern cards to multitexture in one pass (reflections / shadows).
On = Faster (Rec: On)
Half texture size - I think this is all about how much texture RAM your machine has, and how fast your RAM is. With most modern cards you should have enough ram, and the bandwith is enough to not take too much of a hit. If however your computer has integrated video sharing the standard RAM, then halfing the amount used, and thus only having to read half size textures from RAM.
On = faster (Rec: Off)