Jure - you mean, if Gazza's settings are a bit high, it would affect both mine and H@l's PC so we (and maybe others) would see his car warp a bit?
Or do you mean for me and H@l to tune down settings?
It has nothing to do with other (your) computers, they simply draw what were "told" to show. Or not show.
When (and if, not determined that's the precise cause of it but I suspect it to be since I saw same effect with other cars in T1 and that's where FPS are extremely low, I went out and check FPS throughout the lap... yup, T1, by far the heaviest workload) Gazza's PC microfreezes (stutters) a bit it doesn't send out all data packets or they are, rarely but happens, sent out in wrong order. We had similar issues flying online, forgot about technical stuff though. Something to do with front bus width or smthn, probably too many graphic data trying to go through while LAN doesn't get all the bandwidth it needs. Or something.
Personally I never go for "eye candy" graphic settings for the exactly the same reason - smooth gameplay is crucial and I'm talking at least 45fps at all times. I am playing with "refresh rate synch on" so it's locked at max 75FPS refresh rate (monitor related, could be higher or lower depending on your LCD), but and that's crucial, minimum FPS doesn't go as low as it would go without refresh rate lock. Think of it this way: your gfx card calculates 200FPS in vain, cause your monitor is only capable of showing 75FPS. And when your gfx card hits extremely high workload it's still busy trying to do max FPS instead of "never above 75FPS". Simply put it has more time to cope with "high workload ahead" cause it's not busy with so many work demands "right here and now" in the first place.
Plus you get rid of picture tearing. Try it with refresh lock on, u'll see what I mean. That's why I giggle every time I read about "my gfx is doing 250FPS, hooray!!!" Yeah, so it's doing work for nothing... and?
Monitor's the bottle neck by default, not to mention your eyes on 25FPS to begin with.
So use refresh lock, better for your eyes as well.
It's important to keep the car on the track and your eyesight in top condition.
Microfreezes are also most annoying in flying sims, imagine what happens if you're flying very close formation or are very close on someone's six o'clock then plane in front stops in the air/moves position a bit.. Whammo.
People were actually exploiting it using "printscreen" button, pressing it freezes your PC just a bit to send out wrong data (or none of it) and target in your sights started to jump up and down. Or at least it did 5 years ago, perhaps modern rigs are capable of coping with it.
My suggestion would be to use simple wheels in game gfx settings, bit less shading etc. All you want to know is where to turn in the corner anyway, one tends not to notice reflections at 150mph anyway.
As per sunk car - noticed the same thing with nsfast's car in last night's replay. I believe it's quite common, seen it plenty of times (on replays, never in game itself). Probably just bad replay data or smthn.