Unreal Engine Issues

Inversing the scale of a skeletal mesh when it's simulating physics results in the mesh and collision being flipped

The attached project has 3 skeletal meshes. One with its original transform and then 2 copies with an inversed scale in the X axis for one and the Y axis for the other. When pressing play, the meshe ...

Max Depenetration Velocity cannot be set to zero after setting it to a non-zero value

It seems that when setting the Max Depenetration Velocity to a non-zero value, you are then unable to set it back to 0. Tested in //UE4/Release-4.25 @ CL 14469661 and this did not occur so marking ...

Collision lost from body when using world composition and streaming

Physics object from a streamed level does not interact with other physics objects in persistent level. ...

All ELinearConstraintMotion pins in BP reset to "Free" when converting a project to 4.26

When using any of the Set Linear Limit nodes (X/Y/Z) and converting a project from a previous version of the engine, the nodes get their Constraint Type value reset to Free. I tested this with proje ...

Chaos-enabled projects will disable Post Process Volume with sphere tessellation of 4 or higher

Actor Enable Collision does not affect ISM

The problem was reported via UE Bug Submission. I was able to repro with their provided test project. ...

Volume EncompassesPoint is broken in Chaos

While investigating an issue with Cull Distance Volumes, I noticed that AVolume::EncompassesPoint has a broken default implementation when WITH_PHYSX is not defined. If only chaos is enabled it will ...

Kinematic in Physics Asset Overrides Bone Scale of Skeletal Meshes

In a character's Physics Asset, a bone that is set to Kinematic and its children will have a scale of 1 overriding the Skeletal Mesh's Scale Transform settings. When the root of the body is changed ...

Unable to change collision profile on static mesh component to a specific profile.

Changing the collision response type of an instanced actor using a public variable in the construction script does not change the response type

Changing a public variable which is setup in the construction script of an actor to set the actor's collision response type does not change the actor's collision response type. The response type rem ...