Assetto Corsa reaches version 1.3 with a new DLC

Alex Franchini · Oct 8, 2015

Kunos Simulazioni have updated their popular racing sim with 64-bit support and the Dream Pack 2 DLC.

The update weights almost 500MB on Steam and brings along a revised tyre model, visual and audio improvement, and new multiplayer features.

Dream Pack 2 includes the Circuit of Catalunya (2 layouts), 4 racing cars and 5 road cars.

Be sure to check out our Weekly Whip for your 1.3 racing needs, and come join us now on our Public Server to give the new GT3's a test run!

Here is the full changelog straight from the devs:

"64bit build
Car physics is now calculated in separate threads
Fixed KERS disabled in pitlane
Added soft locks (use [SOFT_LOCK] ENABLED=1 in system/cfg/assetto_corsa.ini)
Added support for DRS zones
acServer is now stressing much less Go' GC and should offer more stable performances
Added FORCE_TGT to force low res timer in assetto_corsa.ini
acServer is now using Go 1.5, faster GC
Added server welcome message
Fixed gear ratio appearing with a double "/" in setup screen
Fixed acServer unable to read ini values with a "=" character (ex AUTH)
Fixed driver name displayer not obeying to saved settings in MP
Fixed acServer not creating "results" folder automatically
New algorithms to calculate skid volumes and pitch, now working globally in the entire simulation
Added grain and blister readings in the setup info screen
Added downshift protection to gearboxes
Lap count is now reported using 16bit unsigned integer to server plugins
Now using triple buffer when vsync is on to reduce latency
Exposure settings are now persistent
Fixed audio clicks on surface events
Tyre flat spots are now taking into account tyre softness
Windscreens now receive shadows
ksEditor: now it uses the same ingame engine.
ksEditor: added project menagement
ksEditor: added user personalizations
ksEditor: added floating windows and layout system
ksEditor: added Weather and PPfilter loader
ksEditor: added recent files/project management
ksEditor: added node filter in scene panel
ksEditor: added Material by Texture in Materials panel
ksEditor: added scene icons and side function buttons
ksEditor: added texture detail on Material panel
ksEditor: added Texture Review windows in Utilities
ksEditor: fixed reload texture function
ksEditor: now the default CultureInfo is en-US (number format, ect)
ksEditor: added FOV, Near Plane Slider, Mouse sensitivity, camera angle and position under Viewport
ksEditor: added Dashboard tab
acServerManager: removed some upper limits on parameters
acServerManager: preset name/description is more clear
acServerManager: added welcome message
acServerManager: added qualify limit
acServerManager: added fixed setup management
acServerManager: fixed upload on ftp. Now cfg folder is not deleted.
Fixed driver textures on serveral cars
Fixed circuit outline on track selection UI
Camera Dev App now save F1 cameras' exposure and pitch, F6 cameras' exposure, fov and position and angle
Removed background from Performance Delta App
Redesigned and faster code for logging
Updated Tyres V5 for GT2 and GT3 cars, should give less understeer.
Zonda R and Ferrari 599XX and Formula Abarth now have V5 tyres.
Less lift off oversteer for Evora S on street tyres V5
GT3 and GT2 cars updated aero stalling for front splitter and diffuser
GT3 slight performance balancing
Mclaren MP4 GT3 tyre corrections
Fixed TC digital item showing 0 based index when multiple TC level are available
Now showing Cold and Hot pressure readings in setup status
Added "NA" for IMO temps reading when no set has been swapped out
Added support for track dynamic objects
It is now possible to join a server using admin passoword and be automatically granted admin rights
Joining a server with admin password will override the session "closed" status
Added "ban_id" admin command to ban a user and send straight to blacklist
Remote cars in multiplayer now generate skidmarks
Fixed EDL wrong calculation order"

Join the discussion in our AC forums, and get racing in our Assetto Corsa Racing Club! While you're at it, why not check out some awesome videos and screenshot in our AC gallery?

Youssef Karam · Oct 8, 2015

I hope they get the AMG GT S to the game in 2016 and can't wait for the rest of the Lamborghini family!

Graham Botha · Oct 8, 2015

Very disappointed in the update. The performance is really poor. I run a triple screen setup with 2x gtx980 in sli, 16GB ram and an I7 - 2600k at 4GHz on Windows 10 64-bit. If I scale shadows, and AA down then the performance gets even worse. If I gave a look at the version 1.2 fps average vs version 1.3, the performance is down by 22fps!!! And this is on an I7 running 2x GTX 980 in SLI. WTF!!!

64-bit Fps: Min: 35, Max: 59, Avg: 48.535
32-bit Fps: Min: 40, Max: 85, Avg: 70.626

Michael Dao · Oct 8, 2015

That why I get rid of my triple setup in favour of VR and/or TrackIR

Mike85 · Oct 8, 2015

finally AI got better!

Steve Bird · Oct 8, 2015

Looks sweet

David Cordell · Oct 8, 2015

Mike85 said:
finally AI got better!

I wonder if the update will help reduce the CPU occupency 95-99% issue and allow for more ai ?

Michael Hornbuckle · Oct 8, 2015

Here is an important post from Aris about v1.3:
So the imminent version 1.3 (and Dream Pack 2) brings a whole new bunch of improvements, features and novelties.
Here's some previews regarding the driving (I wanted to write "warnings" but it sounded a bit too harsh

)

64bit - 32bit.
Nothing changes in terms of driving and physics between the two. 64bits though permits addressing bigger chunks of memory and can do stuff like saving bigger replays. I do not know if this is already enabled by Stefano, but if not, will be in the future. Certainly 64bit is the way forward, so start updating too...

Physics:
- New ABS system which now supports 1,2,3,4 channels. Cars should stop better now. (obviously realistic distances)
- Active differentials also at the rear wheel drive cars. I'm not talking EDLs supporting mecchanical diffs but actual active differentials. They can do some great tricks... try the M4, Ferrari 458, Ferrari LaFerrari for some amazing results.
- EDL differentials now active also at the front of AWD active systems. Yes we managed to eliminate some (not all) understeer from the Por... sorry RUF AWD. The Nissan GT-R pulls some amazing tricks too.
- Modified Front splitter height sensitivity for some cars will make some famous turns not so easy to do.
- Added wheel offset simulation in suspension so that you can simulate more easily and accurately the correct suspension scrub. Scrub value is also available in the dev app "suspensions"

V5 Tyre model:
Our tyre model evolves with each release and this is a big step forward! We now have completely reworked load sensitivity equations, new over the peak curve, different flat-spotting based also on load, modified and corrected rolling resistance equations, new heating values and simulation of both surface and core temperatures with speed (from air speed) sensible cool down and more. All of that in the core system

Because of all those changes in the core system, we have put a massive effort to completely rework all the tyres for all the cars. That's more than 130 files each of one with at least 2 compounds, usually 3, sometimes 5... the struggle was (is) real.

As such, the bad news is that some of the cars are still on the V4 tyre model (which is still compatible so your mods also are not broken). The good news is that there are just 7 cars that are still on the V4 model, namely:
Ferrari 312T, Lamborghini Miura SV, Lotus 49, Lotus 98T, Lotus EXOS 125 (and S1), Shelby Cobra 427.
As you can see, they are all either extreme single seaters or vintage tyres. We need some studying to do for them and couldn't make it in time. Expect an update soon™

All the other cars are on the brand new V5 tyre model!

What to expect in terms of driving?
Nothing and everything.
As usual we have a pretty decent idea on what a tyre should do and that hasn't changed, so we don't believe you'll feel something completely new. More of a global improvement of weak points of the old model. Nevertheless my advice is: Forget everything. Forget your laptimes, forget your setups, forget your FFB settings, actually set everything to 100% gain as we changed how the FFB handles for all cars too.
Just drive, from scratch, without any muscle memory.

A few notes.
- Heat your tyres slowly. It will need 1 to 2 laps to bring the tyres to proper temperature both surface and internally in the core. The surface will keep going up and down but the core will stabilise. Then start to push. Otherwise use the tyre blankets
- What was the core temperature on the apps is now surface. Don't go crazy on the surface temperature. It is VERY variable now. It will go up and down in terms of mere seconds! What you need is a proper temp range on turn in, apex, exit. Ignore what it does at high speed on the straights, that's how it works. (look at some F1 heat cameras videos on youtube to understand the effect).
- Cars are even more sensitive to setup now. One click at a time.
- Did you spun out? It happens. But be VERY careful when you rejoin. It really takes nothing to overheat the tyres while doing burnouts to get back on track. The next turn might be fatal! Take it easy for at least 2-3 turns to cool the tyres down.

And a mea culpa. The new heat tyre model is extremely complicated. We should have made a proper app or proper messages to warn you when the tyres are cold, overheated, good or bad condition. We didn't make it. We apologize, we will try to do it... err... soon™. Please be kind and have patience, it's complicated for us too and days have only 32 hours.

Tobbe Bergman · Oct 8, 2015

I have Windows 7 64bit
I have to tick the Force 32bit checkbox in order to make AC work at all !

Cristian Haba · Oct 8, 2015

Im excited for this, all signs point to great things. I always beliebed.

Adrian Brezeanu · Oct 8, 2015

update 1.3 made it unplayeble for gamepad , huge oversteer, tyres lock at every small brake, none of my previous apps for hud tyres etc work

Will Mazeo · Oct 8, 2015

Some big performance hits compared to previous build. "Heavier" than rF2 even with 15 less cars on track

Was going to unninstall anyway so it just helped to take the decision

St3fan · Oct 8, 2015

That's why I am patiently waiting for the first 1 or 2 patches before I decide to launch the game

Or maybe it's because I'm still at work XD

Glaurung · Oct 8, 2015

Great update, the new tyre model is a nice step forward, and FFB has never been so alive.
Good job Kunos.

Deleted member 130869 · Oct 8, 2015

Graham Botha said:
Very disappointed in the update. The performance is really poor. I run a triple screen setup with 2x gtx980 in sli, 16GB ram and an I7 - 2600k at 4GHz on Windows 10 64-bit. If I scale shadows, and AA down then the performance gets even worse. If I gave a look at the version 1.2 fps average vs version 1.3, the performance is down by 22fps!!! And this is on an I7 running 2x GTX 980 in SLI. WTF!!!

64-bit Fps: Min: 35, Max: 59, Avg: 48.535
32-bit Fps: Min: 40, Max: 85, Avg: 70.626

Post on the official forum, something's off with the 64 bit then

Andy Ainsworth · Oct 8, 2015

I'm loving it! No performance issues, in fact it seems to be running jitter free now.
And that GT40 is superb.
Over the moon.

Bez · Oct 8, 2015

I'm getting a cpu occupancy 99% warning that I've never seen prior to the update, anyone else, or any fixes for this?

Will Mazeo · Oct 8, 2015

Bez said:
I'm getting a cpu occupancy 99% warning that I've never seen prior to the update, anyone else, or any fixes for this?

Yeah, that was the case here, if you stay close to the AI the physics graphic go up to 115%, once they spread you have less than that and the warning should be gone.