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ACC general support Note about silent updates Startup troubleshooting ACC savegame reports

Assetto Corsa Competizione - Generic discussion

Discussion in 'ACC General Discussions' started by bgil66, Jun 2, 2018.

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Page 358 of 423

Ace Pumpkin Alien

Epistolarius said: ↑

Great shot.

https://twitter.com/PorscheRaces/status/1159011053470179328
Click to expand...

No ghosting tail to be seen, must be a real life shot...
Great nonetheless.

Ace Pumpkin, Aug 8, 2019

#7141
D.Jankovic Alien

Ace Pumpkin said: ↑

No ghosting tail to be seen, must be a real life shot...
Great nonetheless.
Click to expand...

KTAA on Epic
And saturation on 200

D.Jankovic, Aug 8, 2019

#7142

anthony galmiche and Coanda like this.
Coanda Alien

Ace Pumpkin said: ↑

No ghosting tail to be seen, must be a real life shot...
Click to expand...

haha good one... AP you probably already know. For those that don't you can get rid of ghosting in the dry by using either KTAA or FXA. Not the greatest methods for AA though. In the wet if your using KTAA you need to set the effects < High ie. MID.

Last edited: Aug 8, 2019

Coanda, Aug 8, 2019

#7143
PaulPunkGTX Gamer

KTAA was really a good thing to implement from kunos. Really fast and well working solution.

But whats a "lumirank"?

PaulPunkGTX, Aug 8, 2019

#7144
D.Jankovic Alien

PaulPunkGTX said: ↑

KTAA was really a good thing to implement from kunos. Really fast and well working solution.

But whats a "lumirank"?
Click to expand...

Its the name and position display on the cars. That is glowing up on the windscreen

D.Jankovic, Aug 8, 2019

#7145

Coanda likes this.
Ecnelis Alien

Ecnelis, Aug 9, 2019

#7146

chksix, Epistolarius and dek like this.
Gopher04 Simracer

Anyone know what is the optimal tyre pressure's and temps on average for these cars??

Gopher04, Aug 9, 2019

#7147
Freddie Seng Hardcore Simmer

Slightly OT but here's some footage I shot during the 24 hours of Spa. Hope you guys enjoy I may have more to come

Last edited: Aug 9, 2019

Freddie Seng, Aug 9, 2019

#7148

GT Me, chksix, dek and 3 others like this.
sps_for_race Alien
Gopher04 said: ↑

Anyone know what is the optimal tyre pressure's and temps on average for these cars??
Click to expand...

Aristotelis said: ↑

Tyres! And rain… But first…

The Rules!
The Blancpain gt series uses Pirelli tyres. Different sizes for different groups of cars, mainly 3 sizes depending the weight bias of the car. So front engine cars usually get 325/705/18 all around, mid engined cars get 325/680/18-325/705/18 front-rear and rear engined cars 325/660/18-325/705/18 front-rear.
Compound is one and unique for all races, all circuits, all cars. This means that this single compound must work in all cars, all weather conditions and all kind of circuits.

The above information is crucial in order to understand that these kind of tyres have an extremely difficult job to do. They have to work on cars that go from 40%, down to 55% of their weight to the front. Heavy cars that go up to 1500kg at full race trim while at the same time support well over 500kg of downforce, have to withstand at least 1 hour of hard racing before changing tyres and are driven in various circuits on various ambient temperatures by professionals and gentlemen drivers. At first I also thought “hey that’s easy, I only have 1 compound to do”, then as development went forward and Pirelli and teams started sharing data (thank you so much!) I knew I was into big big trouble… Luckily I have master Stefano always willing to accept a challenge!

Let’s start with the slick tyres.
Slicks have a wide operating range. They give decent grip from 40°C and up to 130°C. Obviously they have a narrower optimum range around 70°C to 90°C. Pirelli defines optimum pressure at 29psi (almost 2bar) but most teams will run a little bit lower. Pirelli though, advises against very low pressures as it is easy to deflate a low pressure tyre on a kerb or similar conditions… For safety reasons it is prohibited to go lower than 20psi (1.4bar) as minimum inflation pressure.
The tyres are always in preheated in tyre heater racks up to 70°C but realistically around 65°C, so expect to start any session (except maybe hotlap) with tyres at around 65°C core.
Pressure in AC now influences the stiffness rate in a non linear way and differently for vertical, lateral and longitudinal. The whole footprint flexes in all 3 axis and I believe you will definitely feel this when attacking kerbs. Damping of the tyre is also affected by heat.
The heating in ACC now has 3 interacting layers. Surface, core and inside air.
The surface heat is quite active, going fast up and down while influenced from slip, flex, rolling speed, ambient temperature, road temperature, air speed and rotational speed. Obviously it exchanges heat with the inner core too.
The inner core, is influenced mainly by rolling speed, flex and surface and inner air temperature.
The inside air is exchanging heat from the core and… brake heat.
For the first time though, we are not going to show you everything, just what the real teams get to look at, which means pressure and core IMO temperatures.

Tyre wear
This is now calculated in 3 separated IMO layers in a way that camber and toe can affect different parts of the tyre wear. If you use excessive amounts of camber and toe on a circuit with very long straights, then you will experience much more wear (and heat, more about it in a minute) on the Inner side of the tyre, making braking and traction worse but not affecting a lot lateral grip… and vice versa of course. Tyre wear is also implemented in a different way. We actually simulate the tread depth and we lower the depth as the tyre wears out. So you start with 3mm of depth at fresh tyres and you wear this out. Normally the teams and Pirelli consider a tyre as a very consumed one at under 1.5mm. The tyre wear is influenced by the distance covered, but most importantly by the slip. The more you slip the tyre, the more it wears and by “slip” we consider not only actual dragging the tyre on turns, braking and acceleration but also toe and camber, so again, watch out on how you setup your car.
Another important factor for wear is surface temperature. The harder you drive the more surface heat you generate, the faster the tyres wear out. Heck you could completely destroy a tyre by doing donuts for some minutes… Obviously you are not going to monitor tyre’s surface temps as it is rapidly changing and hardly measurable in real time (in the real life), but if your core temperatures are on target, then the smoother you drive the less wear you’ll have. Also graining, blistering and flatspotting are still there, with all vibrations now acting also on the suspension movement. Pirelli points out that those tyres do not suffer much of graining and blistering, but if you keep using wet tyres on the dry, well don’t expect miracles. TC and ABS levels can also play a role here. Since flex also influences tyre heat, a stiff suspension and dampers as well as high downforce, can also influence the tyre wear…. so many things, so little time, I know.

The Overall Feelings
All of this works together, obviously in real time and affects many aspects of the tyre behaviour. This is one of the biggest improvements of ACC. Heat, wear, grip, do not just influence tyre grip but actually change the tyre behaviour. Slipangles and slipratios, stiffness rate and damping, lateral and longitudinal flex that is now also simulated, all of them change in real time, depending all of the above factors. You can expect a cold slick tyre to not only have less grip, but to be way more nasty and on the edge. So if it starts raining and you’re on slicks, before aquaplaning issues, you might have to deal with a much more nervous car behaviour because the tyres lost heat and pressure. A consumed tyre has less flex too, generates less core heat and has different peak splipangles. You might find the grip acceptable but the behaviour changed for the worse. All is extremely dynamic and lots of placebo is going to occur…Be brave and endure the difficulties

Still, there’s more. ACC now simulates variable dynamic weather and so we have…
Rain.
Rain in ACC is not simulated by simply lowering the grip. We simulate mathematically an actual water film depth. Tyres go over it and depending on tread design, load, speed and more, they manage to drain the water out and have a contact with the ground… or not. If the tyre can’t drain enough water, then it starts losing contact, up to complete aquaplaning, which means total loss of grip, zero, null, nada. So in ACC the feeling you get from a wet circuit is a good grip but a constant feeling of “something is about to happen”. You might do a turn in a specific way and feel there’s more than enough grip, you might even think “hey that was easy after all, arcade™!”, only to push a tiny bit more the lap after, or have the rain fall harder 3 laps later and go completely aquaplaning sliding out of the corner. The wetness also lowers drastically the heat generated by the surface layer of the tyre, so temperature of the tyres will go down inevitably.

Slicks can go into aquaplaning very VERY easy. I strongly suggest that you watch the first laps of the Hungaroring race1 of the Blancpain GT Series to understand how cars on slick struggle on damp conditions, but also how the BMW M6 that had wet tyres could work his way from 11th position to 2nd and struggle right afterwards when the dry line started to form. You can also see him searching for wet spots to cool down the wet tyres. Here's the video. Race starts in 33:00

Also in ACC wet tyres will overheat dramatically in dry conditions and you can cool them down going outside the dry line, searching for wet spots. Beware that in such conditions it’s easy to place one side of a car in the wet spot or puddle, resulting in high rolling resistance force from the water depth (and sudden aquaplaning) that can easily destabilze your car.
I will also mention the obvious…there is no way you can stay on the track under heavy rain on slick tyres. We’re not talking being slow or having difficulties to control the car… we’re talking complete and utter loss of control and sliding around on “ice”. Fear not though, for people that want to experience the graphical majesty of rain conditions but in a less hardcore grip situation, we have a nice option slider that will lower the amount of physics water… just for fun.
Staying on the dynamic track subject, here’s how a track surface changes through different conditions.

A green track will get gradually rubbered. marbles can appear at the side of the rubbered line

If rain starts then (depending on the force) it will wet the track and the rubbered line will start to be very slippery. You might be forced to avoid it or explore alternative lines.

If rain keeps on pouring heavy enough, it will clean the rubbered line and you might be able to turn back to a more traditional racing line. When this happens? I don’t know, try, experiment and find out!

If rain keeps on going, puddles and “rivers” might start forming. Those also might force you to try different lines again. Puddles and rivers are placed in specific realistic places on the circuits, derived from actual drivers feedback and their onboard videos.

If rain is lighter or stops and many cars are lapping, a dry line might form or simply a “less wet” line. You will obviously have more grip over the dry line but wet tyres will overheat.

Finally puddles will be the last to dry out, so watch out even if the track is slightly damp and slick tyres are faster, puddles can still catch you out.

Obviously this is a generic description of how the whole system works: in reality and when the whole thing will be finalized, your experience might vary a lot and can become more unpredictable. The whole idea behind it, is to have deal with unpredictable conditions that will force you to adapt.

Special guest…
Marbles.
Did you know that real drivers will go over the marbles to collect them on their slick tyres so that they gain a kind of “tread” which lowers a tiny bit the risk of aquaplaning? Of course you’ll have to deal with less grip and vibrations, but nothing is worse than aquaplaning and it might help you until you go in for your pitstop… or the rain might go away and you’re f***ed… ops!

Then we have tyre damage… but that’s something we still working on and I’ll explain it to you later.

So, what’s next? Aero I guess… back to writing. (where’s my coffee!)
Click to expand...
sps_for_race, Aug 9, 2019

#7149

Coanda, Aristotelis and Gopher04 like this.
Gopher04 Simracer

Cheers SPS..

Gopher04, Aug 9, 2019

#7150

sps_for_race likes this.
Jack Bancroft Simracer

v1.0.7 Live

Restart Steam

Patchnotes: https://www.assettocorsa.net/forum/...rsa-competizione-v1-0-7-update-out-now.59646/

Jack Bancroft, Aug 9, 2019

#7151
DHMoto Gamer

I am thankful and happy for the continued improvements. Kudos. I am curious though that the pit crew seems to never make it onto the upcoming fixes list. Are they ever coming back? My hope is they are being enhanced to feature an interactive guy with the lollipop versus the unrealistic blinking carnival sign we have now. It would be great if you could pull in and bump the board like IRL.

DHMoto, Aug 9, 2019

#7152

chksix and Chriss like this.
Ace Pumpkin Alien

Ecnelis said: ↑

Click to expand...

Mostly against such things here, why? Just watch it!
Just Iike that Perel (who the ****) thing...
Just advertising.
Experience it on your own to judge.
No need for such things here!

Ace Pumpkin, Aug 9, 2019

#7153
Aristotelis Will it drift? Staff Member KS Dev Team

Can you calm down please. It's the nth time you post like that. I dunno why you're so negative for drivers videos, but whatever the reason, if you don't like those videos, then don't watch them and let others enjoy them if they will.
1st warning

Aristotelis, Aug 9, 2019

#7154

R3V3NG3 BR, Keithb23, pippo10 and 13 others like this.
Aristotelis Will it drift? Staff Member KS Dev Team

DHMoto said: ↑

I am thankful and happy for the continued improvements. Kudos. I am curious though that the pit crew seems to never make it onto the upcoming fixes list. Are they ever coming back? My hope is they are being enhanced to feature an interactive guy with the lollipop versus the unrealistic blinking carnival sign we have now. It would be great if you could pull in and bump the board like IRL.
Click to expand...

I can confirm that the animated pitstops are being worked on and will return. Can't confirm about the lollipop or sign, we'll see what we can do. Keep in mind that we are not allowed to have any "human" character being invested or simply pass through by a car, so that limits us a bit.
Thanks for the patience

Aristotelis, Aug 9, 2019

#7155

SylverFyre, MonzterPixel, R3V3NG3 BR and 17 others like this.
Micii1 Racer

Aristotelis said: ↑

I can confirm that the animated pitstops are being worked on and will return. Can't confirm about the lollipop or sign, we'll see what we can do. Keep in mind that we are not allowed to have any "human" character being invested or simply pass through by a car, so that limits us a bit.
Thanks for the patience
Click to expand...

And gridgirls? Lol lol

Micii1, Aug 9, 2019

#7156
Coanda Alien

Aristotelis said: ↑

Keep in mind that we are not allowed to have any "human" character being invested or simply pass through by a car, so that limits us a bit.
Click to expand...

Please excuse my ignorance. What does this mean? The way I understand it is legally you can not drive through a virtual human being. Is that correct?

Coanda, Aug 9, 2019

#7157

ohyeah2389 likes this.
Son Hardcore Simmer

Aristotelis said: ↑

I can confirm that the animated pitstops are being worked on and will return. Can't confirm about the lollipop or sign, we'll see what we can do. Keep in mind that we are not allowed to have any "human" character being invested or simply pass through by a car, so that limits us a bit.
Thanks for the patience
Click to expand...

How come a car can't go through a human?

Also, maybe have the board that's out in the pit road during the pit stop sometimes instead of the lollipop chap, then have an animation where someone runs out and picks it up and takes it back into the garage.

An example of the board here ^

Son, Aug 9, 2019

#7158

Keithb23, chksix and Kopiller like this.
Felge Schneider Hardcore Simmer

Son said: ↑

How come a car can't go through a human?
Click to expand...

I would think that the SRO doesn't want the possibility to "run over" people in their game.

Often, in racing games, the car manufacturers don't want their cars to be too much damaged for PR reasons, which limits the damage models of the game.
I think this is a similar situation. Sounds riddiculous from a players perspective.

Felge Schneider, Aug 9, 2019

#7159
Coanda Alien

Felge Schneider said: ↑

I would think that the SRO doesn't want the possibility to "run over" people in their game.
Click to expand...

PC madness if you ask me. We can currently drive through a whole car and its driver. I am currently up to 3,723 kills

Felge Schneider said: ↑

Often, in racing games, the car manufacturers don't want their cars to be too much damaged for PR reasons,
Click to expand...

True I have heard of this however I remember in one of the dev blogs (as people were asking & speculating on the damage model) I think Aris said there is nothing in their contracts that stated this.

Coanda, Aug 9, 2019

#7160

ohyeah2389 and Keithb23 like this.

Page 358 of 423

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