Dr. Kazunori Yamauchi Gives Lecture on Gran Turismo's Driving Physics & Production

[GTPNewsWire]

This is the discussion thread for a recent post on GTPlanet:

Dr. Kazunori Yamauchi Gives Lecture on Gran Turismo's Driving Physics & Production

This article was published by Jordan Greer (@Jordan) on October 31st, 2017 in the Gran Turismo Sport category.

 

[Johnnypenso]

What was that car in the last video? Even though it was recorded off screen I can sense that the sound in the game might be the best car I've heard.

 

[Ryan Dungey]

What was that car in the last video? Even though it was recorded off screen I can sense that the sound in the game might be the best car I've heard.

That's a Ferrari 458 GT3

 

[CopperySinger]

He recreated the most fascinating things I have ever seen in a racing game. Job well done Dr. Kaz.

 

[Corsa]

Taking from the article, specifically this paragraph..

“The most difficult simulation is the tire model,” Kazunori said. “It was actually not that difficult for us to simulate tires that could match real-world lap-times; we did that accurately for the first time back in 2007. The difficulty comes in making that simulation drivable in the game.”

I would like to hear more about that last sentence, and can't help but wonder if each car has a superb/loose physics model, then they smooth it over to fit the "everyone" category.

I know what I'm trying to say here, just can't quite describe it.

 

[PJTierney]

Some interesting stuff in there. Now, time for the tuners to reverse-engineer it to find optimal settings

 

[Johnnypenso]

Taking from the article, specifically this paragraph..

“The most difficult simulation is the tire model,” Kazunori said. “It was actually not that difficult for us to simulate tires that could match real-world lap-times; we did that accurately for the first time back in 2007. The difficulty comes in making that simulation drivable in the game.”

I would like to hear more about that last sentence, and can't help but wonder if each car has a superb/loose physics model, then they smooth it over to fit the "everyone" category.

I know what I'm trying to say here, just can't quite describe it.

I've always felt that the tire model was the weakest part of the simulation. It really pales in comparison to some of the best sims out there IMO.

 

[GTWelsh]

I've always felt that the tire model was the weakest part of the simulation. It really pales in comparison to some of the best sims out there IMO.

In what way?

 

[Suzumiya]

In what way?

No simulated tire flex, no tire pressures, very basic heating, the tires are just how much grip and how much grip they lose over a certain amount of time

 

[marcvic]

Great write-up and a nice look into the innards of PD operations. Interesting that only one modeler touches each car from start to finish!

 

[Shahar]

For anybody interested this is a great lecture by Brian Beckman (Who worked on the tire model in Forza). He explains some of the challenges of creating a good tire model. He also wrote a book about the topic called: "Physics of Racing".

 

[TheNuvolari]

Gives a lecture about the physics --> Gets hate because his game's not 100% Simulator.

 

[Suzumiya]

Gives a lecture about the physics --> Gets hate because his game's not 100% Simulator.

Why trust a guy who can’t get tires right in his own “serious simulation?” Why does GT get away with not being a 100% simulation by the fans when Kaz himself is speaking that a true simulation isn’t hard, and using GTS to try and teach something from real life? But of course it’s not a serious sim right, that’s why he’s using the game to teach serious physics.

 

[Racelow]

Grab the popcorn and make way for the unperfected perfectionists. They beleive a different non-perfect sim racer game should have the honerary award instead of PD by critiqing petty things in compare to theirs.

 

[GTWelsh]

No simulated tire flex, no tire pressures, very basic heating, the tires are just how much grip and how much grip they lose over a certain amount of time

I'm sure I've seen tyre flex, it's subtle but I'm sure it's there.

Here for the beta:
https://www.gtplanet.net/forum/threads/tire-deformation-spotted-within-gt-sport.355989/

Here for the full game:

 

[Johnnypenso]

Grab the popcorn and make way for the unperfected perfectionists. They beleive a different non-perfect sim racer game should have the honerary award instead of PD by critiqing petty things in compare to theirs.

Or grab the popcorn and listen to the whining and crying of people who don't know how to have an honest discussion about the strengths and weaknesses of a game. Either one work's because you get popcorn.

 

[Toyota GT1]

Y'all are arguing over nonsense and I'm just looking for the picture of the countach ingame. Someone screenshot it?

 

[breyzipp]

Those PD presentations always look so clumsy with those translation moments, I feel like they loose a lot of confidence and persuasion that way. 20 years of Gran Turismo, shouldn't Kaz have picked up English by now?

 

[Corsa]

Grab the popcorn and make way for the unperfected perfectionists. They beleive a different non-perfect sim racer game should have the honerary award instead of PD by critiqing petty things in compare to theirs.

I dislike popcorn, it gets stuck in my teeth.
I'm not saying Kaz does not deserve an honorary award he's done so much for the gaming world.
I was more curious of their physics base design for each car involving the tire model interacting with the track.
For instance, do they have a raw starting point that feels more alive in which they dial in to suit everyone?
A perfectionist would say something like, hey racelow there's three grammatical errors in your post.

 

[ghostrider135]

Those PD presentations always look so clumsy with those translation moments, I feel like they loose a lot of confidence and persuasion that way. 20 years of Gran Turismo, shouldn't Kaz have picked up English by now?

Hate to say it but you've got a point, I mean I always thought English was the lingua franca what with it being required here for example and many other places, It certainly would make conversing with PD a heck of a lot easier. Also I'd like to thank all those who speak English as a second language they put the effort in to be more inclusive 👍

 

[trustjab]

Hey thread, are we arguing yet? Sorry, just being a little funny I figured this awarding may be a little contentious.

Good on Kaz, I think it's deserved for the things he has done. A game is still a game. Simulation or arcade, but a bit of both with some ease of use is worth much more than full blown sim or full blown arcade if you want to appeal to the masses (or both crowds). That's what I think makes GT what it itls. You don't have to agree. But for people who want to just pick up the game and race, it's there. It's also there for people who want to tune and run competitively.

I'm intrigued by the 80mm ride height... I wonder what car that is?

 

[Guffaluff]

Y'all are arguing over nonsense and I'm just looking for the picture of the countach ingame. Someone screenshot it?

I second that! The mention the Countach being seen in Scapes .. I want to see that!

 

[TS050]

Those PD presentations always look so clumsy with those translation moments, I feel like they loose a lot of confidence and persuasion that way. 20 years of Gran Turismo, shouldn't Kaz have picked up English by now?

IIRC, Kaz knows English, but he prefers to speak in his main language. He might not be as comfortable speaking English, or something.

 

[NLxAROSA]

I think the question of how realistic GT physics are is irrelevant in this particular context. He's just giving a presentation of how they approach their car, track and physics modelling, nothing more nothing less. Whether someone else has a better (or worse) result with their method(s) is not relevant here and certainly doesn't disqualify him (or anyone else) from speaking.

 

[Johnnypenso]

Hate to say it but you've got a point, I mean I always thought English was the lingua franca what with it being required here for example and many other places, It certainly would make conversing with PD a heck of a lot easier. Also I'd like to thank all those who speak English as a second language they put the effort in to be more inclusive 👍

Kaz is a cunning lingua fracist in that he does speak english but doesn't choose to do so during formal media events when in presentation mode...for the most part.

 

[ghostrider135]

Kaz is a cunning lingua fracist in that he does speak english but doesn't choose to do so during formal media events when in presentation mode...for the most part.

If he spoke English at such events Translator-san would be out of a job and people would be left in no doubt about what is and isn't in the next installment

 

[gear1420]

Taking from the article, specifically this paragraph..

“The most difficult simulation is the tire model,” Kazunori said. “It was actually not that difficult for us to simulate tires that could match real-world lap-times; we did that accurately for the first time back in 2007. The difficulty comes in making that simulation drivable in the game.”

I would like to hear more about that last sentence, and can't help but wonder if each car has a superb/loose physics model, then they smooth it over to fit the "everyone" category.

I know what I'm trying to say here, just can't quite describe it.

Grip is added as we know when looking at car files (which we are not supposed to know about)
.ini files have many lines of hexadecimal code and one is the grip coefficient, which of course can be lowered or raised to match data from the real car

 

[ToyGTone]

I remember seeing the countach on GT's instagram.

 

[Corsa]

Grip is added as we know when looking at car files (which we are not supposed to know about)
.ini files have many lines of hexadecimal code and one is the grip coefficient, which of course can be lowered or raised to match data from the real car

This is very interesting.
I've really began paying attention to physics in the last year, and would like to study up on it.
Information that goes in depth is very hard to find, and copyrights apply I'm sure.

@Shahar also thank you for the Brian link, I'll look at it after work.

 

[super_gt]

My favorite part in Gran Turismo Sport is tire pressure adjusting KAZ