Typo for Linear Plasticity Type: shirnk instead of shrink

UE - Simulation - Physics - Jan 10, 2023

Regression: Tested in UE5/Release-5.0, this issue also occurs so this is not a regression. ...

Trace to complex collision returns incorrect PhysicalMaterial

UE - Simulation - Physics - Dec 15, 2022

In ConvertQueryImpactHitImp, MaterialIndex is looked up from InternalFaceIndex, but FTriangleMeshImplicitObject:: MaterialIndices is an array by ExternalFaceIndex, so it returns incorrect material i ...

When changing the Material of a CompleCollision during PIE, the change is not applied to the PhysicsMaterial.

UE - Simulation - Physics - Nov 24, 2022

If changing the material during PIE, the content of the material will be reflected immediately, but the physics material will not. Once the Mesh (Complex Collision Mesh) is cleared and reset, it wil ...

Changed Constraints do not show up when enabling Show Only Modified Properties

UE - Simulation - Physics - Nov 16, 2022

This is not a regression. Tested in //UE5/Release-5.0 CL20979098 Changed Constraints on a Static Mesh do not show up when enabling Show Only Modified Properties. ...

SetOneWayInteraction functionality has no effect on the simulation

UE - Simulation - Physics - Nov 11, 2022

Calling SetOneWayInteraction on a BodyInstance has no effect within the physics engine. The state of the flag is passed in to Chaos but nothing actually uses the value once it is there. It is expe ...

Geometry Collection Cache Mode recording that has shattered on the ground shows that Collection Freeze when switched to Play and simulating again

UE - Simulation - Physics - Oct 24, 2022

Cache Mode: record seems to simulate fine, in Cache Mode: Play, the object does not simulate fracturing Repro Rate: 5/5 ...

StaticMeshComponent occasionally doesn't simulate physics after SpawActor.

UE - Simulation - Physics - Aug 23, 2022

When spawning Pawns with a StaticMeshComponent with SimulatePhyscis=True, they occasionally may not simulate physics. This can be reproduced by simply repeating the respawn. The frequency of reprodu ...

The GetCombinedForces put out wrong value when the vehicle is reversing

UE - Simulation - Physics - Aug 19, 2022

Reproduced 3/3 times. A similar bug occurred with PhysX ([Link Removed]) Check the function:  FVector FSimpleAerodynamicsSim::GetCombinedForces(float VelocityIn) if the velocityIn is negative, th ...

Physical Material Masks do not work in non-editor builds

UE - Simulation - Physics - Aug 12, 2022

Physical material masks are not working as expected in cooked builds. Licensee reports that the mask data is empty at runtime. ...