Horizon faked its lighting? I'm not talking headlights or any other light sources except the sun, which casts dynamic shadows for almost every object. A feature afforded by targeting the game to run at 30fps. There's only so much you can do when your goal for a nex-gen game is to have it run at 60fps AND at native 1080p. So again, it boils down to how Turn10 chose to distribute the computational power that's available to them AND without taking too much of their limited development time; we're seeing the fruits of that in several places (autovista for all cars, addition of laser scanned tracks for both old and new, increased track detail, etc). Sure, they're using static shadowmaps but like I said, it'll more than suffice because as long the shadow of a lamppost or tree casts on your car as you park underneath it, that's enough to create a sense of realism for most people.