So, iRacing has their mythical "bump map" which makes their cars float but how does AC translate their details scans to its track surface? Apparently (unless things have changed), the answer has been available for quite some time: Perhaps I'm the only one who never got around to watching this video, but I nearly jumped out of my seat when I saw the image. iRacing has never shown anything like this, to my knowledge! I think the detail is quite impressive, if this is the end result. Using the photo mode app, I tried to zoom around the track to find any bumps, but it was really difficult to see (I would had no idea that the surface was so many polygons without the above picture). When you get up close to the white lines, though, some evidence of it is revealed: One thing that is cool with iRacing, though, is the long videos and articles they produce that show some of what is going on behind the scenes (although, imo, indies like Shining Rock Software and Jonathan Blow have them beat by miles and miles when it comes to revealing technical stuff)... ...I wish Kunos would produce something similar for us nerds.