Having bought a decent new gpu the other day (radeon 5850), I was wondering how to increase the draw distance at certain tracks like Road America to prevent those pesky track object popups (trees, cranes and so on). Some googling got the result as usual:

– go to your gamedata\vehicles\<series> folder and track down the folder for the car you want to modify

– open the <vehicle>.cam file in the text editor of your choice (I use gnu emacs)

– look for the cockpit cam definition

– increase the following variable to 10.0 or so:

LODMultiplier=(10.000000)

Save the file and start rFactor to enjoy a popup-less (or at least much improved) track environment.