alright, I see that now, yes it’s a quite simple bug that can be fixed with a single line.
for anyone that works with the source code go to UFGearEffects::physicsSurfaceUpdate function and update like below:
for (int i = 0; i < mWheels.Num(); i++)
{
UFGearWheel* w = mWheels[i];
w->setFrictionFactor(1.0f);
w->setAdditionalDrag(0.0f); //add this line to fix
...
}
and about turning the vehicle easily, the roughness effect only adds a drag force along the wheel’s forward direction, i’ll try applying it along the horizontal axis of the wheel…