Chaos Vehicle keeps tilting right no matter what. Can anyone help?

[Hotaku_6]

Tried everything. Check physics assets, changing manually the center of mass (fixes the tilting, makes the vehicle end up veering to the right), aligning the bones to be exactly mirrored, used a plugin to set up a vehicle for exporting to UE from Blender. Nothing. I’m one second away from going crazy. Any help?

[brs-sebascova]

Hello there @Hotaku_6!

That sounds excruciating, since you have already covered most of the usual fixes for an issue like this. Still, the problem has to come from one of the following points:

• Suspension: Make sure all values across each wheel side is the same (length, travel, spring).

• Center of mass: For this one in particular, Blender has a history with imports/exports with UE, sometimes inverting the scales of certain bones, which UE will still accept, and cause problems. Re-check all your alignments, and make sure any transforms from Blender are applied.

• Wheels setup: Double check that the dimensions of each wheel are identical, and all bone pairings are correct. Check the colliders as well, if any of the assigned collisions to your wheels has the tiniest difference, it will tilt the vehicle. Use the commands below to show all the paraments related to them:

Wheeled Vehicle Commands

Command	Description
p.Vehicle.ShowWheelCollisionNormal	Shows the hit location and normal of the surface that the wheel raycast has hit.
p.Vehicle.ShowSuspensionRaycasts	Shows the suspension raycast length. The color indicates whether the ray hit something (green), or not (red).
p.Vehicle.ShowSuspensionLimits	Enables or disables the suspension limits visualization.
p.Vehicle.ShowWheelForces	Enables or disables the wheel forces visualization.
p.Vehicle.ShowSuspensionForces	Enables or disables the suspension forces visualization.
p.Vehicle.ShowRaycastComponent	Displays the name of the component the wheels are in contact with (from the raycast hit).
p.Vehicle.ShowRaycastMaterial	Displays the name of the physics material that the wheels are in contact with (from the raycast hit).

As well, there’s further resources to check for this scenario:

UE’s full documentation covering Chaos Vehicles, review the sections tied to suspension:

Chaos Vehicles | Unreal Engine 5.6 Documentation | Epic Developer Community

---

A thread discussing how to manipulate the vehicle’s tilt and suspension, which could allow you to setup a countermeasure for your current tilt:

500×500 2.84 KB

I am not that experienced in programming or blueprints, I know just very basic stuff. I was following a tutorial for a vehicle, but I wanted to do some extra stuff. Like making the vehicle tilt on the side as it turns. Like in this image, the vehicle tilts on the Y axis not just turning. [image] The tutorial made the vehicle tilt backwards and forwards during acceleration via the Set Center of Mass on the X axis. Like this [image] Based on acceleration (W & S on WASD controls) the center o…

---

Full guide on how to create a fully working bike with chaos vehicles, in case you need to reconstruct from scratch, follow the steps along (with more wheels, of course):

Motorbike (Motorcycle) Physics with Chaos Vehicles - Unreal Engine 5 Blueprints Tutorial

[Damfaca]

Try recalibrating physics or wheel setup

[Hotaku_6]

Thank you for your help. The problem was that I was downscaling it 25%, and that was messing with the physics. Had to reimport it smaller. Now my problem is that my trailer keeps sliding to the right. The center of mass appears tilted, already checked everything I’ve stated, with no avail. Even reimporting won’t do anything.

Also, how do you make the command lines you listed to work. I’ve inputed them on the console command and they seem to not do anything.

[Hotaku_6]

@brs-sebascova

p.Vehicle.ShowSuspensionLimits

ok, had to set debuddraw to true.

the suspension raycast is red except on one wheel, augmented the suspension drop and such, got them all green. But now it still vibrates the trailer to the right.