iRacing 2021 Season 4 Patch 2 released

The second patch for iRacing’s 2021 Season 4 is finally here as of Tuesday. It’s a fairly significant update in terms of download size and included content. The update began at 9:00 a.m. ET / 2:00 p.m. BST and concluded about 90 minutes later.

Following the Petit Le Mans special event weekend on the sim, some of that recently updated content on the sim, such as the Road Atlanta track itself receiving some more TLC. Some of the participating Petit Le Mans cars, like a few of the BMW cars as well as a Ferrari and a Porsche also received an update of some kind.

While the required updates weren’t big, some of the UI and general simulation upgrades will be welcomed. There were quite a number of cars and tracks receiving an update or two, all of which can be seen in detail below. Check out the patch notes as well as the screenshots which show all of the updates for an account with 100% of the content.



  • The current iRacing Season and Race Week number are now displayed in the iRacing UI.

Side Bar

  • As a user navigates the app’s sidebar, the app will remember and auto-navigate the user to the sections that were previously visited.


  • A new page with items from the Official iRacing Shop is now available in the Store section of the iRacing UI.

Hosted Racing

  • A new option has been added to the Create a Race interface: “Start race with qualifying tire choice”. This forces all participants to begin the Race Session with the same tire type with which they performed their Qualifying with. If the participant did not complete Qualifying, they may select any available tire type to begin the Race.
  • Resolved an issue where deleting a Heat Race configuration for a future scheduled Hosted Session was causing an error when attempting to edit the future Hosted Session.

Hosted AI Racing

  • Fixed an issue where registering then withdrawing from your own Hosted AI Racing Session would carry-over the AI Opponent amount slider from the session to subsequently Registered sessions.

AI Opponent Rosters

  • Fixed an issue where adjustments to AI Car Sponsors were not being saved.

Time Attack

  • A button has been added to the results section to download the Time Attack Results as a .csv file.

Paint Shop

  • A new sponsor, Force Dynamics, has been added to the Paint Shop.


  • Fixed an issue where the Temperature and Humidity icons were swapped.


Race Servers

  • The iRacing race server farm name is now displayed on the Info page on the Session screen, and is also included in the message shown when the “show latency” control is used.

Team Racing

  • Fixed a rare issue that could occur when the current driver and a team member both tried to pull the current driver from the car at the same time. The two requests could interfere with each other, leading to a stuck vehicle or other unpredictable results.

AI Racing

  • AI Drivers have improved their skills with the Porsche 911 GT3 Cup (992).
  • AI Drivers have received additional training entering the pits at Bristol.
  • AI Drivers have received additional training entering the final pit stall at the Sebring Club layout.


  • The video memory usage slider should now better account for the use of SpeedTree.


  • Sunset specular map lighting on tracks and cars has been adjusted to remove a strange greenish tint that could appear.
  • Environment specular mapping at very low sun angles has been adjusted slightly.


  • Fixed an issue with a lighting pop at sunrise and sunset at several older tracks, such as Laguna Seca, which haven’t yet been upgraded with the newest shaders.

Driver Animations

  • Pedal animations should now use the raw throttle position from the user instead of the processed signal. This should prevent things like ECU engine cuts and traction control from producing impossible movements from the pedals.
  • Fixed an issue with excessive foot movements during auto-blips for GT3 cars that have driver gas and brake animations.


  • Fixed a grammar issue in a spotter message.


ARCA Menards Chevrolet Impala

  • Fixed an issue where the inside windshield frame was showing exterior reflections.
  • iRacing setups have been updated.

Audi RS 3 LMS

  • The unused license plate has been removed from the interface model.


  • Fixed a texture issue with a screw on the front fender grill.


  • For the New Damage Model, wheel damage properties have been updated.


  • iRacing setups have been updated.

Chevrolet Monte Carlo SS

  • iRacing setups have been updated.

Dallara IR18

  • The driver view has been shifted up slightly.
  • iRacing setups have been updated.

Ferrari 488 GT3 Evo 2020

  • The rear splitter has been updated with the latest design.
  • Ferrari logo has been updated for certain camera distances.

Ford Mustang FR500S

  • iRacing setups have been updated.

Formula Vee

  • The level-of-detail (LOD) settings for the driver have been updated to prevent the driver’s head from disappearing at long camera distance.

Lotus 49

  • The level-of-detail (LOD) settings for the driver have been updated to prevent the driver from disappearing at long camera distance.

McLaren 570s GT4

  • For the New Damage Model, wheel damage properties have been updated.

NASCAR 1987 Class Cars

  • Fixed an issue where these cars were not loading with Road tires at the Mount Washington Auto Road.

NASCAR Gander Outdoors Class Trucks

  • iRacing setups have been updated.

NASCAR Next Gen Class Cars

  • iRacing setups have been updated.

Porsche 718 Cayman GT4 Clubsport MR

  • For the New Damage Model, wheel damage properties have been updated.
  • Fixed an issue with the display glass.

Porsche 911 GT3 Cup (992)

  • Adjusted the gridding order of this vehicle for multi-class sessions.
  • Fixed an issue with a flipped pit sign.
  • The texture mapping of the B pillars have been updated and may now be painted.
  • The interface model for this car has been updated.

Porsche 911 R GT3

  • The reflectivity of the windshield has been adjusted.

SCCA Spec Racer Ford

  • When the Auto Blip driving aid is enabled, downshift blips have been dramatically improved.

Street Stock

  • Steering wheels should now rotate properly when viewed from external cameras.

Supercars Holden ZB Commodore

  • The texture map of the B pillars and nose vents have been updated and may now be painted. Custom paint schemes will need to have their textures adjusted using the new template for this car.


Barber Motorsports Park

  • The seam filler plane has been adjusted to unblock the Turn 14 tunnel.

Circuit de Spa-Francorchamps

  • Some crowd members have had their attention redirected towards the track.

Hickory Motor Speedway

  • Environment cubemap location has been updated.

Hungaroring Circuit

  • Brake markers have been updated.
  • Bumps have been smoothed out at the blue merge line and before the inner curbing at Turn 6.
  • The Track Rules tab has been updated with images.
  • The track camera set has been updated.
  • A variety of environment artwork has been updated.

Kansas Speedway

  • Smoothed a bump on the apron between Turn 1 and Turn 2.

Lime Rock Park

  • Patched some seams.

Mount Washington Auto Road

  • Fixed an issue where a sinister shadowy beam could be seen emitting from the peak of Mount Washington on certain graphics settings.

Okayama International Circuit

  • The gapfiller texture has been lowered to prevent overlapping the pond.
  • Dirt staining intensity on the track surface has been reduced.

Oulton Park Circuit

  • Fixed an issue where the Intl w/out Brittens and the Intl w/out Hislop config names were swapped.

Road Atlanta

  • Detail settings on a variety of objects have been updated so they render correctly based on graphics settings.
  • A gap filler model has been added to help hide seams in the world.
  • Lightmaps for some environmental objects have been updated. 
  • Some event vehicles have been updated.
  • Michelin Tower has been updated with new level-of-detail models and textures, and the crowd visibility settings have been updated.

Weathertech Raceway at Laguna Seca

  • Fixed a piece of curbing that could cause snagging on the outside of Turn 10. 
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