I have noticed over the years, thought that now with the updates I'll file again, maybe now it will get noticed! I'll explain with the pictures below - best if you save them and compare them locally. This first set shows how through time the gravity (or something related) keeps increasing. I just randomly thought about maybe the rotation of the Earth changing the direction of gravity. I noted I usually sway left. There are three consequences. First, the head position changes over the scenario, so gauges and levers come into or go out of view (check the 5 button below the leftmost screen). Second, switching camera back to 1, there is a noticeable head sink - it is how I captured this first picture. Third, it tends to affect head bob - I assume the head position is also based on a telescope effect and it behaves differently from a compressed position. Just drive the ICE 1 from Siegen to Hagen, all stops, you'll notice. It tends to bob massively on left hand turns and grade changes, but not so much to right hand turns. Edit: I'd like to add that the effect depends on the loco or session. This one, I went backwards, seeing more of the controls, but in other cases I tend to move forward, seeing less of the gauges (say, the Class 158 where the default view is already high). In this midway shot you can see that the position changed, despite being stationary compared to the above shot. On the left, the 5 comes in, and the speed marker ahead is a bit lower. Also the base of the tower just above the wiper sunk. And many more things around the edges. Obviously, we are sitting lower. 3) Arriving at Hagen, you can see it's a bit different again, so it's an ongoing effect. I never ran a long enough scenario to see whether I eventually float out of cab, or simply get that telescope under the chair fully compressed. A completely different manifestation, but I wonder whether it's the same thing. If you pay attention to the verticals, you can see they are not. The phenomenon is reproducible with virtually any loaded US wagon with the same physics as the old coal rotary gondolas: the low gondolas (scrap), high gondolas (rock, waste). These cars are prone to tilt in bends to begin with. But if you start a scenario (say, Colton & Northern free roam), fool around for an hour or two, and then approach to couple them, when they activate, they'll tilt randomly to one side. Some will not, it's like there is a small randomization added to each car upon activating to make it slightly more realistic, however at first it's invisible. Over time, though, they tilt like this. Notably, they don't tilt further in bends. Summary: It appears that in TSC gravity is an increasing function of current scenario running time. Shouldn't be. In both cases, Save & Exit & Continue resets. Hence, it takes 60-90 minutes to reproduce.