Official General AI Comments & Discussion Topic

Ok I tested a bit. It's definitely not an AI issue to me, more of a huge issue with the stock AMG GT4 setup. It understeers on braking, it understeers off throttle, it understeers on throttle.
I adjusted a few things to make that car rotate a bit. Front ARB down to 1, Rear ARB up to 3, Rear Wing to Zero, Clutch Preload down to 30Nm. With that the car still is not agile in any way, but is able to properly handle Spa.

Here's a short clip. I had to lift a bit earlier to not crash into the Audi, but in the telemetry you can see that I just lifted, stayed in 5th gear and my speed didn't below like 204 (you usally dropped down to 190). This was againts 110% AI with high aggression and I way pretty much in their pace

With other more agile cars like the Porsche it's defiintely easier to get eau rogue by just lifting even in stock setup, but the AMG is a beast in terms of power, so what the car might struggle in fast corners it definitely get's back on the long straigths.

 

Yes, often they go in the pits with mechanicals and it's announced a few laps later that they have retired, so that looks right for a 2 lap race.

I installed these and tried the following:

Stock USA Gen 1, 20 percent distance of a real Nascar road race, 5x mechanical failures, nobody retired. I note that the expected failure time range for this class isn't listed in the Customising AI drivers OP. Perhaps they aren't programmed as having mechanical failures? In the skinpack, how did you decide on the reliability values, did someone give you a range to use?

BMW procar. Before I started, I noticed that there is no AI file with that skinpack and the livery names also don't match the names in the Names+ AI file. I edited the names AI file so the 5 Swiss and Austrian drivers in it would match one of the liveries in the skinpack - these drivers have 0.5 vehicle reliability. I did a 100 km race at Le Mans (7 laps) again with 5x failures, so equivalent to about 150 minutes of racing. Two of the 21 "normal" i.e. unmodified drivers retired with mechanicals, whereas among the drivers from the skinpack there were two mechanical retirements and one also lost more than a lap of Le Mans with some issue that was eventually repaired. That suggests that outside the custom AI file, the Reiza default drivers have a reliability of 1.0 or even higher. The real M1 procar races were about 30 minutes, so if you do sync to race with this one then you shouldn't expect many or any retirements if everyone is calibrated to go 400 minutes between retirements. You should still have been observing at least some though, so this is a hmm.

 

I tried this morning and already with your tips I could keep up better. But even with lighter cars I feel like they carry a lot more speed than I do exiting the corner. I will try to tweak the setup as well. Thanks for the tips and for taking the time!

 

I studied racing-reference results of the 1987 NR season and based all of my values off that. Retirements included. But indeed it looks like a car class issue that the failures are just not working.

 

Apologies if this is the wrong place, but this is about the AI. During a rolling start race at Velopark using the Formula Inter, the two cars on the left suddenly move to the right when the green light comes on; the video below was recorded specifically to replicate this issue.

 

So i have owned AMS2 for a couple of years now and every time i have been blown away by the combo of car experience, graphics, sound, feeling of the car. Just driving a CART F-USA or a V10 F1 car, really awesome to hotlap or do training sessions.
However whenever i moved to doing a race versus AI (i only play offline) i've always lost my enthusiasm due to the way the AI behaves. So much every time i ended up playing other games, mainly Iracing & Gp4. So after all these years i only had 40 hours in the game.

This weekend i updated the game and spend over 20 hours with the F-USA Gen 3 at Road America racing the AI. Tested a bit, tweaked the AI settings (less agression, less brake and accelaration %) and did a bunch of 50 lap races with 19 ai, and i must say i am really impressed with the AI.

• After tweaking the settings a bit i had no issues with the AI being to aggressive or bumping me. I just need to watch my mirros and dont close gaps when an AI is committed. This is a major change for me compared to some time ago when i felt the AI was just way to aggressive for a realistic and enjoyable gameplay.
• Every now and then i actually (Accidently) divebombed the ai or missed my braking point, and in these cases the AI is really trying to get out of the way.
• I changed the ai skills in the text file so that they were more spread out, with the slowest being roughly 4 seconds slower then the fastest ai, quite similar to the real results back then.
• I also added the driver reliabiliyt line to the file and set it to 0.33 for all, and every race i had like 4 or 5 mechanical issues for the ai.
• One of my main issues with the ai in the past was that there would be a train of cars all close together forever. This is much less, although still somewhat in the game. I would say now its playable and ok, but maybe 6 out of 10, maybe 7 out of 10. So this is where the game can improve imo.

So quite enjoyable experience for me. However i still have some questions, so i'm hoping others can share their experience and possibly solutions to issues i still encounter.

• The ai is way faster in the race then in qualifying. If i put on soft tyres and 4 laps of fuel i am 1 to 2 seconds faster then the fastest ai in qualifying. Then in the race i have a hard time keeping up with the 6th place driver. I have in the driver file the fastest qualifiers at 0.99 qualifying skill so i cant up that. Obviously i can up the overall rating of 100 to maybe 110 ai skill, and then reduce the individual race rating in the driver file to maybe 0.6 or 0.7 for the fastest drivers, but it seems weird to me to have it that low. Anybody got a suggestion for this?

• How does the AI decide on their pit strategy? It is a 50 lap race, the tank holds max 21 laps of fuel, so i would expect the ai to spread around 16 to 17 laps per stop on a 2 stopper, however all the ai pit after 14-15 laps (and have longer 2nd and 3rd stints). What is the logic between this and can i change the ai pit strategies?

• Does the AI not feel the impact of fuel load? Or have heavy tyre wear? Because i see that when i take on 18 laps of fuel that i am slower then the AI at the start of the race, but around lap 10 i am starting to become much faster then the AI. Which is weird because by that time they still should have ~4 laps less of fuel on board compared to me?

 

The AI in this simulator is getting way too realistic!
AI warming up tires during the formation lap? Maybe this behavior was already there, but since it was a race with a formation lap after a long time, I have to admit it was surprising! In the video, the AI cars are the ones in front—it's just a clip, but it happened throughout the entire lap.

 

I really do enjoy racing against the AIs recently and have found some of the troubling tracks like Termas Del Rio Hondo and Virginia International Raceway Full to be more fun and better to race at than before.
But a certain track needs an urgent investigation: We are talking about Buenos Aires Circuito No.15.

I am losing slightly to the AIs in turn 1, but the worst of the worst is through Curvon De Salotto(Turn 3) where the AIs have far superior handling, They also are faster through Chicana de Ascari! Only then for the AIs to be slower throughout the entire last sector where I can make up the lost time I have to them!

This is done with 105 % skill level! I also have 1.00 on the Brake Slider and 0.5 on the Traction Slider as well as medium aggression!

 

Been putting a lot of hours into GT3 vs AI lately and the racing is in a really good place now. Night and day compared to when I first started playing.

One thing that still stands out on longer races though. The AI has a habit of bunching into little packs of three or four, swapping places inside that group, then that group pulls away from the cars behind. After 45 minutes or so the field is just broken into clusters with big gaps between them.

Not sure if that’s rubber banding or something in how they manage pace once they’ve passed each other, but it gives you an unrealistic spread by the later stages. Shorter races hide it a bit better.

Otherwise the AI racing itself has come on a long way. Just that pack behaviour is the one bit that still feels off.

 

How is the driver file setup with regards to raceskill?
I see the same pattern of groups of 2 or 3 or even 4 cars forming, but not that the drivers behind are unexpectedly slower. They are slower quite in line with their race skill.
So to put it simple its like if in f1 the mercedes cars would fight each other they still pull away from the alpine behind them.
At least thats my experience.

What i find less reaListic is that in formula car the cars group together and stay within tenths from each other for laps.

 

Tried this combo last night with a 20-min multiclass sprint w/GT3, GT4, Porsche Cup and LMP3. AI peformed masterfully. Might tone the brake scalar a little bit but they played really well with these settings!

 

So I have spent loads of time on the Nurburgring 24H 2025 since the latest update. I really do enjoy it so much! But there are a few spots at the track where things are here and there.
I will this time show you with a track map and mark out where the issues are with texts! Mostly I have driven GT3 Gen2, GT4 and GT1 2005. Skill level 110

 

I'm competing in a full Retro3 Grand Prix at Jacarepaguá. During practice, the AI hits 299 km/h at the end of the straight and 320 km/h in qualifying. Okay, they turn up the turbo boost for qualifying and use soft tires. So I do the same, BUT—even though my practice times are competitive—I'm 2 seconds faster in qualifying!!! Does the AI actually use soft tires in qualifying?

 

The AI never uses soft or medium or hard compound. AI has a "AI tire" specific for every class.

 

Is it a new feature? Back when I requested a lot to Reiza to implement AI usage of different tyre compounds the info we had was they use the softest compound available.

 

This is something i see in other classes as well. The F1 V10 Gen 3 and F-USA Gen 3 for example.

I'm easily getting pole position but in the races am in no way close to having the pace of the leaders.

I 'solve'' it by running hard tyres and/or more fuel in qualifying.

 

To add to what has been said about using only one dry compound, there is also another issue with the AI in many, if not most class/track combos: The pace of AI drivers makes no sense over the course of a race weekend. That is, they tend to be the fastest in practice, much slower in qualifying, and somewhere in-between during the race (in some cases I've seen them do faster lap times in race than during qualifying). This definitely needs to be addressed, especially before the career mode launches (whatever that might look like).


There are also two more important things I want to address because I have repeatedly seen it during my most recent singleplayer races:

1. AI pace still differs hugely between different classes and tracks on a given strength setting (relative to a human player). Example: On 90 strength, I was lapping between 5-7 seconds faster per lap on Silverstone National while driving the Ginetta G40 Junior. Then I drove the German Group A cars on Sebring yesterday, set to 91 strength, and I had a hard time keeping up with them during qualifying (barely managed P4 or P5 in the 190E Evo II, right behind a group of Audis); though to be fair, the pace of the lead Audis was so that I *could* have won the race had I not had an incident with the race leader two and a half minutes before the end of the race. Up until that point, it had been a brilliant race actually. But this leads me to
2. AI vehicles are still basically immovable objects when the player makes contact with them. The incident I mentioned above happened while I was trying to outbrake the leader (which had to brake much earlier due to the heavier AWD car), but I realized it was too risky so I backed out, stayed as far on my side as I could before entering the turn - and then the other car just cut diagonally in front of me, hitting my front with their back and making me spin. The AI, on the other hand, didn't even budge - even though the contact should have upset their car balance by all means. This needs to change.
   Normally I'd say "okay, maybe I'll just enable some aids for countersteer or stability" - but I honestly don't want to do that because 1) I've been only using authentic driver aids for hundreds of hours and 2) it's only going to create or reinforce bad habits on my end, which I'd rather avoid.

I realize that 1) is hard to fix without giving specific data and lap times to Reiza, so I apologize for that; right now (and in general) I'm jumping between classes/presets and laps, so the most I could usually provide is data for 1, maybe 2 tracks using a particular class/preset so it might not be representative. Should I be able to gather more data I'll gladly provide it.

2) on the other hand is something that has been an issue for as long as I can remember. I'm an offliner and don't race AMS2 online, so I can't say for sure, but I assume the experience is very different when racing against other humans who use the same tire model. As it stands, AI drivers are more or less still "moving obstacles to avoid" (even though their race craft has improved a lot recently); which is a shame, especially in touring cars where close door-to-door racing is normal, and rubbin' is considered racing.

Thanks for attending my TED talk.

 

@Alex Alvim

I’ve had the same experience with the FRetro Gen3 and FClassic Gen1 Turbo cars. They don't seem to use the turbo during races, so to balance things out and make it more fun, I run qualifying sessions using the race setup and the standard turbo setting (for both qualifying and the race). In fact, I think the AI's qualifying times and their turbo usage during races are areas that need improvement.

On a positive note, FUSA 2023 stands out; it was surprising to see the AI actually using P2P during the race—resulting in lower lap times compared to qualifying.

 

Does anyone else think the AI in the F-V10 Gen2/3 and F-V8 Gen1 has absolutely insane traction (both in the dry and wet) and wet-weather pace, especially in terms of cornering and traction, or is it just me?

The other cars without TC feel fine, but these two in particular feel weird.
I tried to address it with custom AI XML tweaks, but I still couldn't get it under control.

 

Is point 1 really a must solve? I mean its % for different series/cars, is that such an issue apart from remembering the settings.