Have a quite serious issue going on with AM. This issue stems back to Stock Car Extreme (and possibly 2013 or even before) but I used to only notice it on karting tracks but now I notice it much more places. And it's making the game unplayable. Track & Layout Used: Many tracks (most recently used Floripa) Car Used: Any car - (most recently used BV8 and FVee) Applicable Settings: Having "Time Scale" and "Shadows" simultaneously set to anything other than "none" and "off" respectively Report: A constant, perfectly timed interval stutter exactly 1 second or so apart. I believe it has to do with the sun/shadows/night/day refresh/update stuff. Steps to reproduce: If you take a car out on Floripa, you can see this quite easily. The easiest way to see it is to drive the car from TV cam view (enable steering help full, TC, ABS, SC, etc.) and look at the big stutters / frame-skips that happen especially when the car is driving past the cam in a side view or 3/4 view. It's easily noticeable when driving too. Two ways to avoid this problem: A) Set "Time Scale" to "none" (not "1x", or "2x", or anything other than "none"). Doing so allows for "Shadows" to be set to any setting, even "Full", with no problems. B) Set "Shadows" to "off" (not even "minimum" but "off"). Doing so allows for "Time Scale" to be set to any setting with no problems. So you have to either fully disable day/night cycles or shadows; you can't run both at the same time as there are issues when doing this.