rFactor stores your user options and settings in a file called (your username).plr. There are two lines in the (your username).plr file which allow you to adjust the graphical performance of rFactor when racing at night.

To access your .plr file:

Use windows explorer, or My Computer, and navigate to your rFactor folder.

Navigate down to the "Userdata" subfolder.
Within that folder, you will see another folder with the name you setup as your driver name in rFactor.
Click on thumbnails for larger pic.

Find the file named (your username).plr. You can open this file with any regular text editor. Notepad or Wordpad are both fine options.

Scroll down about 2/3rds of the way, until you see the following lines:

Max Headlights="8" // Max headlights visible relative to your car.
Headlights On Cars="0" // Headlights illuminate other cars.

The "Max Headlights" line determines how many headlights rFactor draws, in relative distance to your car. This number includes both cars in front and behind.

The "Headlights On Cars" line determines whether or not all headlights drawn will reflect off car bodies. This effect can put a great stress on your system. Not only does it have to draw realtime reflections when the headlights of your car illuminate your opponents, but it also draws realtime reflections from the headlights of all your opponents when they shine on other cars. Depending on how many headlights you have set in the "Max headlights" line, this can grow exponentially very fast, suddenly putting very high stress on your system.

Cheers Jerry this works very well.

I've updated my rF night time performance thread so everybody can see the sort of FPS gains that are possible.

I think this should be added to the rFactor guide if it isn't already in there Tim/Todd. If I had had this info before the PLMS I would have raced...

btw I can't believe the default for Max Headlights is 256!

Thanks Jerry, I'll give 'em a bash... is there something similar for GTR2?

STICKY PLEASE! 35 cars on the track yesterday wasn't enough. It'd be nice to cram as many drivers as possible and this tip will help get the guys with this issue fixxed up and on the track.