NARS GRF Parameters
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The North American Renewal Set takes several grf parameters. The parameters should be entered with a space between each number;
- after the grf name in newgrf.cfg for TTDP
 - by clicking the "parameters" button in the newgrf window in OTTD
 
GRF Parameters
| Number | Function | Details | 
|---|---|---|
| 0 | Running sounds | Running sounds (but not custom horn sounds) are disabled if set to 1 | 
| 1 | climate availability; add the numbers together | 1 = Temperate 2 = Arctic 4 = Tropic  | 
| 2 | Livery cycle | Normally, player 1 gets livery variation 1, player 2 gets livery variation 2, etcera. The value of this parameter is added to the player number; ie, if this parameter is set to 2, then player 1 will get livery variation 3. | 
| 3 | Miscellaneous features; add the numbers together | 1 = some company coloured boxcars from 1920 (instead of all brown) 2 = Canadian version 4 = maglev runs on standard maglev track in OTTD 8 = Disable forced deactivation if other sets loaded in OTTD.  | 
So, for example, 0 7 3 4 would make the grf available in all climates, player 1 would get livery 4, and the Canadian version would be active.