Child static mesh added to vehicle breaks wheels collisions

Development World Creation
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1

I need to implement modular vehicle, Im trying to test that using blueprints by adding 1M_Cube as child static mesh on adv vehicle template, with auto weld enabled wheels looses collisions (half of wheel is below floor as you can see on attached pic)
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82858-car+cube.jpg
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With auto weld disabled wheel collisions are fine but Cube doesn’t collide with env (it should cause whole vehicle to collide - including box).

82859-car+cube2.jpg
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I’ll need finally move that to c++, so here is another problem, when I’m adding static mesh in C++ auto welding doesn’t work at all.

Tower = ObjectInitializer.CreateDefaultSubobject(this, TEXT(“Tower”));
//Tower->AttachTo(RootComponent);
static ConstructorHelpers::FObjectFinder BlockStaticMesh(TEXT(“StaticMesh’/Game/Props/towers/war_tower.war_tower’”));
Tower->SetStaticMesh(BlockStaticMesh.Object);

2

Just quick update - this is a visualisation how to recreate issue, big box is a child (statis mesh) of a vehicle. It is important to place big box above car, if you scale it down, collisions of wheels will work.

3

faced the same issue just right now, at version 4.14.1
just as you’ve illustrated - child static mesh doesn’t accept any collision, else wheels are broken.

have you find any sort of solution for this?

4

I dropped using adv vehicle template and recreated it using PhysX and blueprints, let me know if you find solution for that