friction <coefficient of friction> <slip speed>
This sets the friction for a specific slip speed. The friction value used will be interpolated from the nearest speeds set. You can set the friction for up to 8 different speeds.
roll_resist <low pressure resistance> <high pressure resistance> <speed>
This sets the rolling resistance for a given speed. The values used will be interpolated from the nearest speeds set. You can set this for 8 speeds.
texture <texture filename>
This sets the texture for the tile.
This sets how deep the erosion will be. Default is 1.0.
This is the lowest force that will cause erosion. Lower forces will not cause any erosion. Default is 50.0.
This is the upper limit on erode force. Higher forces than this will not cause extra erosion. Default is 150.0.
This sets the displacement for the maximum erode force in feet. Default is 2.0.
This sets the radius of the eroded area in feet. Default is 4.0.
This sets how deep the inner erosion will be. This is applied in addition to the regular depth/radius when digging. Default is 0.125.
This sets the inner radius of the eroded area in feet. This is applied in addition to the regular depth/radius when digging. Default is 2.0.
This sets the minimum slope erosion will create. Default is -0.5.
This sets the maximum slope erosion will create. Default is 0.5.
erode_off_speed <feet per second>
This sets the minimum speed required for erosion to happen in feet/second. Default is 10.0
erode_on_speed <feet per second>
This sets the speed where erosion is fully on in feet/second. Default is 15.0
This sets the erode force scaling when the slip rate is below the lower limit. Default is 1.0.
This sets the erode force scaling when the slip rate is over the upper limit. Default is 1.5.
erode_slip_lower <feet per second>
This sets the slip speed where erode_slip_base_scale is used. Default is 0.0.
erode_slip_upper <feet per second>
This sets the slip speed where erode_slip_scale is used. Default is 5.0.
This sets roost paramters. You can have 4 different roost types. Here are the parameters, with their default values:
This sets the texture used for the roost.
This sets how many roost particles will be thrown per step.
This sets how much the roost will dig into the ground when track erosion is enabled.
If the slip speed is less than this no roost particles will be thrown.
slow_speed=0.0 fast_speed=64.0 slow_angle=1.57 fast_angle=0.196
These control how far the roost follows the wheel. The speeds are in radians per second. The slow angle will be used at the slow speed and the high angle will be used at the high speed. The speeds in between are interpolated between the squared speeds.
This is the initial size of the roost billboard.
This is how much the roost will grow in 1 second.
This is the drag value. The roost particle will decelerate by its velocity scaled by this value every second.
This scales the initial velocity of the roost particle.
This randomizes the initial velocity of the roost particle.
r=255 g=255 b=255 a=255
This is the initial color of the roost.
fade_r=0 fade_g=0 fade_b=0 fade_a=-256
This is how much the roost color will change every second.
If you set this to 1, instead of following the wheel the roost will splash out at 45 degree angles to the sides. Some of the other settings are ignored if this is 1.
This adds the tile to the list.