There were 3 problems with headlights in rFactor. 1. It wasn't really a lighting but was equally framerate-consuming to lighting 2. Instead of being projected forward, light was projected top-down 3. Boundaries used when projecting headlight texture were not optimized - causing much bigger performance drop than they really needed to. As for light flares - yes, adding them helps a lot, because you can finally see approaching car in mirror, rather than two white points that you can't see. But perhaps now, with introduction of HDR and postprocessing flares will no longer be needed. All you need to do is make object bright to see a glow around it. Flare effect can be added by postprocessing filter, too. This means modders will no longer have to add them. Engine will. Postprocessing flares are better in other ways, too. For example - if you see headlights in mirror, and they have a flare - this flare will be visible in mirror only. But if postprocessing adds flares, then that car's flare will expand beyond mirror boundaries - just like you're being blinded by light reflected in mirror. This is more realistic. Of course effect of air lit up by strong light should be composed into scene, not added in postprocessing, but flares and other blinding effects are down to postprocessing.