Gran Turismo 6 general Physics Discussion(as well as video)

nickg07
No one else looking at this wondering why the front splitter on the front driver wing is going down through the tarmac?
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It's not surprising. They didn't model a "hitbox" for the ground surface in GT5, and a few other sims omit this as well. It would be painful without getting the suspension travel exactly right, also if the car isn't broken down into small enough elements, there is no point in simulating the damage caused by this as it will be just plain wrong.

I wouldn't expect any consequence from this collision on the PS3. That might change on PS4.
 
OK forget the hit obox if it was you'd just see sparks flying.

My point is its rolling too much. Because Nissan don't sell q sports car like that.
 
nickg07
OK forget the hit obox if it was you'd just see sparks flying.

My point is its rolling too much. Because Nissan don't sell q sports car like that.
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There have been a few posts pointing to the opposite. Also, the suspension travel might not be exactly correct due to a combination of PD's data and model error. This doesn't seem like an issue.
 
nickg07
It's not the damage modelling that concerns me but my point is that I doubt Nissan sell a 360z that you scuff the front splitter by braking and turning?
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Have you ever driven a car hard enough in real life that the front splitter gets scraped or cracked ? It does happen.

Starts at 1:40 till the end, the Hosaka Tuning Factory R33 GTR front splitter scrapes under hard braking and this is a track tuned car with very hard springs F 18 kg and R 16 kg. Tsuchiya really pushed the car hard into very corner, now imagine that R33 GTR with stock springs :)

 
nickg07
It's not the damage modelling that concerns me but my point is that I doubt Nissan sell a 360z that you scuff the front splitter by braking and turning?
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And for the fifth time in two days.....

37455d1164165049-much-leaning-body-roll-lean.jpg
 
Bigbazz
To top it off there is still no deadzone setting, so with a brake pedal that even with the slightest touch of pressure acts in a way that adds considerable braking power (unrealistic even by sensitive modern powered brake car standards).
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I feel the same way, I have modified my brake pedal with a load cell and just resting my foot makes the pedal register ~10-20% travel which makes GT5/6 brake hard: I really wish there was a deadzone % setting in the options as it would make it a lot more realistic.
 
R1600Turbo
The black splitter underneath is plastic, and could flex and bend back upon impact with the ground. I don't see the issue.
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What I would expect to see is material being ground away, not flexing and recovering original shape. Not that the damage modeling really matters to me.
 
The Z looks realistic to me. We're driving cars in GT in full on anger, getting every inch out of suspensions. Most of us are so used to GT5's overall stiffness, that some softness seems wrong.
 
I just had another go on the demo and i'm not convinced on the physics. Try this yourselves, go on the Clubman Cup first race in the 370Z and turn off all assists except ABS1. Now on the GV main straight get up to about 80 in third and start countersteering left to right violently. The car visually rolls but It's near impossible to lose control, even with crazy angled slides either way and quick countersteers, it's a piece of cake to catch it, very unrealistic. I did this with a controller, sensitivity 7.
 
I can't be bothered to get my wheel set up to test it but I'm sure it'd be mostly the same unless we have a hidden aid on a controller. By all means try it yourselves and tell me what you think.
 
Samus
I just had another go on the demo and i'm not convinced on the physics. Try this yourselves, go on the Clubman Cup first race in the 370Z and turn off all assists except ABS1. Now on the GV main straight get up to about 80 in third and start countersteering left to right violently. The car visually rolls but It's near impossible to lose control, even with crazy angled slides either way and quick countersteers, it's a piece of cake to catch it, very unrealistic. I did this with a controller, sensitivity 7.
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I steered exactly once and the car spun out.
I didn't even have to use weight transfer by steering to one side and then quickly to the other.

And now?

EDIT: Wheel btw.
EDIT2: 80mph, third gear.
EDIT3: Without any throttle input I had to slightly do the weight transfer trick by steering to one side and then to the other, but only once.
 
Last edited:
Lock2Lock
Well yeah, of course it's faster.
Still, you can't turn your wheels all the way full lock on a DS3.
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And stick loses to wheel on precision steering, smooth counter steering with a stick is quite a challenge.

If a steering wheel can go left and right as quick as a stick does, the result might be the same when zig zag like mad. Try 200 degrees steering :)

I spun out zig zag like mad even at less than 60 mph or 100 kmh with the 370z - my steering sensitivity is at default 0.
 
dr_slump
I steered exactly once and the car spun out.
I didn't even have to use weight transfer by steering to one side and then quickly to the other.

And now?

EDIT: Wheel btw.
EDIT2: 80mph, third gear.
Click to expand...

There is an issue with controller input then. If I can be bothered i'll make an off screen video.
 
Samus
There is an issue with controller input then. If I can be bothered i'll make an off screen video.
Click to expand...
The edit might interest you.


I'll try it with a pad too. Just a minute...


EDIT: With pad and without using throttle it's indeed hardly possible. If you stay on throttle it's easy though.
 
I did the same test as Samus yesterday. While it's pretty easy to prevent the car from completely spinning out with a controller, I don't think one can react as fast with a steering wheel. But thats also the case for almost any racing game/simulation I've driven so far. Controller = better reaction time.

Edit: It sure looks a bit stupid to zig-zag like mad without ever losing the control, I give you that. But if I use the controller I am pretty sure I can do the same in GTR2 or Race Room or something.
 
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ZoidFile
I did the same test as Samus yesterday. While it's pretty easy to prevent the car from completely spinning out with a controller, I don't think one can react as fast with a steering wheel. But thats also the case for almost any racing game/simulation I've driven so far. Controller = better reaction time.
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Its something that GT5 and FM4 suffer from as well with a controller, dead easy to test in those, start doing donuts and then just let go of the thumb stick, the steering and wheels centre but the car carries on doing donuts.
 
dr_slump
The edit might interest you.


I'll try it with a pad too. Just a minute...


EDIT: With pad and without using throttle it's indeed hardly possible. If you stay on throttle it's easy though.
Click to expand...

I did it full throttle albeit running into the limiter in third and had no problem keeping control, the only limit was running out of straight.
 
nickg07
Im not sure what your trying to show me because that pic shows the splitter not entering the tarmac.
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That the body roll its as near as damn it right.

I've ripped the front spliters off and cracked bumpers due to body roll on road cars before (on track).
 
You have to remember that control pad steering is indirect control. In some cases it will steer to the optimal angle and no further, and in some cases it will react far more quickly than a steering wheel. You sacrifice the fine control a wheel gives for some responsiveness. I have to use 7 too, any less feels totally lethargic when I use the thumb stick, but it does make any car seem completely un-spinnable.
 
True but I was getting to crazy angles and easily catching it, it didn't seem realistic even with the controller smoothing. The car never felt like it would snap on me.
 
Well, I've driven some rounds with the DS3 in Race 07 (Stick not D-pad of course) and zig-zagging ends in tears really fast. I feel more of a pendulum effect in race 07, at a certain point you have so much momentum no counter-steering in the world can save you.

But for the record the stick is way more direct in Race 07, there is nothing that smoothes out your input in any way.
 
Samus
True but I was getting to crazy angles and easily catching it, it didn't seem realistic even with the controller smoothing. The car never felt like it would snap on me.
Click to expand...

Yes because its easy for PD to dial in the right amount of front wheel direction to correct things when you are using a controller. The controller is very indirect connection to the direction of the front wheels and it is easy for PD to add things to make it easier to drive in that case.
 

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