Neck FX in Assetto Corsa: A Complete Tuning Guide for Maximum Realism

To quickly switch between profiles, use Content Manager: create separate camera presets for each car class and link the corresponding files to them neckfx.ini (for example, neckfx_gt3.ini, neckfx_f1.ini). This will eliminate the need to edit the config manually before each race.

Solving Jitter and Latency Issues

The two most common complaints about Neck FX - this is micro camera shake (especially at high speeds) and delays (lag between the movement of the car and the reaction of the head). Causes and solutions:

⚠️ Attention: If jitter only appears on specific tracks (eg. Nurburgring Nordschleife), the problem may be incorrect data about road irregularities in the track itself. Try updating it or using an alternative version.

• 🔧 Jitter at speeds above 200 km/h:
  • Reduce EngineVibrationScale up to 0.2–0.3.
  • Boost GForceSmoothing up to 0.7–0.8.
  • Disable RoadBumpEffects (install 0).
• ⏳ Delays (lag):
  • Make sure that in assetto corsa.ini installed PRELOAD_ALL_TRACKS=1.
  • Disable vertical sync (VSync) in graphics settings.
  • Lower PhysicsStepsPerSecond in assetto corsa.ini up to 360 (default 400).

If the problem persists, check CPU usage during the race (via Task Manager). Neck FX may conflict with background processes, especially if you have processor with 4 cores or less. In this case try:

1. Close all background programs (including Discord, Steam Overlay).
2. Set process priority ac.exe on High through Task Manager.
3. Disable NVIDIA Reflex or AMD Anti-Lag in the video card drivers.

Check .NET Framework version|Disable VSync in game settings|Set PRELOAD_ALL_TRACKS=1|Close background programs|Lower PhysicsStepsPerSecond to 360-->

Compatibility with other modifications

Neck FX often used in conjunction with other popular plugins such as Sol, Custom Shaders Patch (CSP) or Real Head Motion. However, not all combinations work consistently. Here are the key compatibility points:

Particular attention should be paid to interaction with Sol. If you use both modifications, in the file sol.ini be sure to disable:

[CAMERA]
ENABLE_HEAD_MOVEMENT = 0
ENABLE_G_FORCE_EFFECTS = 0

Otherwise, the effects will overlap each other, creating exaggerated camera movements, which not only look unnatural, but can also cause nausea.

Fine-tuning to your driving style

Even with a correctly selected profile for the car class Neck FX may require additional calibration to suit your personal driving style. For example, aggressive pilots who often use traction control when exiting corners, they may encounter excessive head movements when slipping. In this case it is recommended:

• 🔄Zoom out YawScale up to 0.9 (will reduce lateral movements during drifts).
• 🔄 Boost PitchScale up to 1.1 (will enhance the response to acceleration/braking).
• 🔄 Disable EngineVibrationScale (0.0) if vibrations from the engine are distracting.

For pilots who prefer smooth style (for example, in endurance races), it is useful to increase GForceSmoothing up to 0.8–0.9 and reduce LookAheadStrength up to 0.1–0.2. This will reduce eye fatigue during long races.

If you are using steering wheel with feedback (for example, Logitech G29 or Fanatec DD1), synchronize settings Neck FX with parameters Force Feedback:

• 🎮 At high FFB Gain reduce HeadMovementScaling on 0.1–0.2.
• 🎮 If the steering wheel vibrates on uneven surfaces, reduce RoadBumpEffects in Neck FX.

Performance optimization

Neck FX is a plugin that consumes CPU resources, especially on weak PCs. If you notice FPS drops when the modification is enabled, try the following optimizations:

1. Disable unnecessary effects:

   RoadBumpEffects = 0
   EngineVibrationScale = 0.0
   WindEffects = 0

2. Reduce the physics update rate in assetto corsa.ini:

   PhysicsStepsPerSecond = 300 // instead of 400

3. Use lightweight profiles for weak PCs:

   [LowEnd_PC]
   HeadMovementScaling = 0.7
   GForceSmoothing = 0.8
   UpdateFrequency = 30 // instead of 60

On laptops with integrated graphics (Intel UHD or AMD Vega) it is also recommended to disable Dynamic Shadows in the graphics settings and lower the render resolution to 720p. This will free up CPU resources for processing Neck FX.

⚠️ Attention: If head movements become too sluggish after optimizations, try increasing UpdateFrequency up to 45 (but not higher!) and reduce GForceSmoothing up to 0.5. This will add responsiveness without putting a heavy load on the processor.

Advanced techniques: custom profiles and scripts

For advanced users Neck FX supports advanced settings through custom profiles and even scripts on Lua. For example, you can create separate configs for:

• 🌧️ Rainy weather: increase RoadBumpEffects to transmit hydroplaning.
• 🏔️ Mountain tracks: increase PitchScale to simulate ascents/descents.
• 🚦 City trails: reduce LookAheadStrength due to frequent turns.

Example of a custom profile for rain:

[Rain_Profile]
HeadMovementScaling = 1.0
GForceSmoothing = 0.5
RoadBumpEffects = 1.2 // Increased bumps
EngineVibrationScale = 0.3
WindEffects = 0.5 // Wind gust effect
LookAheadStrength = 0.4 // More "looking" due to slippery roads

You can use scripts to automate profile switching Lua in Content Manager. For example, this script will apply the profile neckfx_rain.ini when loading a rainy session:

function onSessionStarted(session)
if session.weather == "rain" then
ac.setNeckFXProfile("neckfx_rain.ini")
end
end

Scripts are placed in the folder assetto corsa/extension/lua and require basic programming knowledge. Easier to use for beginners manual switching through Content Manager.

FAQ: Frequently asked questions about Neck FX