There's no photo mode and replays have less polys while its being developed.
Anything pcars you see is real time. You have a real time free cam mode what devs use when making games and what we use for taking screenshots and making videos via fraps etc. In a replay you can use free cam, move where you want in real time too.
Here's a video to show you how it works, note this is real time, no replay, I'm controlling the car from free cam.
I should also add that next week we'll have a hi res screenshot function put into the build which is for future magazine covers,prints, billboards etc. Since 2011 to May 2013 its all been real time user fraps captures
So how many cars can you get on screen with that quality without tanking FPS?