[CrashReport] Fatal error: Cast of nullptr to Actor failed - UE4Editor_CoreUObject!CastLogError()

Tools - Jul 19, 2017

This is a common crash affecting users in 4.16, and has been occurring since at least 4.14. It has affected more than 400 unique users, unfortunately they have provided little information. User Des ...

Decals Normal only + Material Attributes

UE - Graphics Features - Mar 24, 2023

This does not just work with BaseColor, you can affect any of the outputs by connecting something to a disconnected CreateMaterialAttributes. ...

Launching a Project which uses Depth of Field crashes to Home Screen on iOS8 device

UE - Platform - Mobile - Sep 10, 2015

When depth of field is activated in a project running on an iOS 8 device, the project will close to the Home Screen. ...

Light components stay visible if "Actor Hidden In Game" is checked

UE - Graphics Features - Feb 6, 2017

Light components stay visible if "Actor Hidden In Game" is checked. This issue occurs even when other components (such as a static mesh) are no longer visible. I tested with a static mesh component ...

App crashes when Launching on or launching packaged project on tvOS or iOS

UE - Platform - Mobile - Aug 1, 2016

Launch on to tvOS crashes the app on the device and returns the user to the main screen. This also affects packaged projects Update Project packaged in shipping configuration launched successfully ...

Adjusting properties of a Blueprint instance's components in the level does not update references to the properties in the BP's Construction Script

UE - Gameplay - Components - Oct 6, 2015

Adjusting properties of a Blueprint instance's components in the level does not update references to the properties in the BP's Construction Script. Note: this would work in 4.8.3. Reproduced in 4. ...

Meshes often render or flicker black in one eye on OSVR

UE - Platform - XR - May 6, 2016

Found on: //UE4/Dev-VR CL-2967563 Often, meshes will render completely black in one eye on the OSVR. This seems to affect close meshes more frequently than far away ones. Sometimes the meshes flick ...

Pawn Blueprint cannot have variables default value set in Engine ini

UE - Gameplay - Blueprint - Jun 1, 2017

When using a pawn blueprint, you cannot modify the value of a variable in the config files. This issue does not affect other kinds of blueprints, as this issue does not affect actor blueprints. Re ...

Collisions doesn't work at BeginPlay against Instanced Meshes if their Mobility is Static

UE - Simulation - Physics - Jul 1, 2015

User reports that in 4.8 in some cases bodies for Static-mobility ISMC instances are not yet initialized when BeginPlay is called. It seems like deferred creation for level streaming should be com ...

Rotation popping when attaching the negatively scaled hand mesh of a motion controller the child of a box collision component (left hand)

UE - Platform - XR - Mar 7, 2017

The left hand in the VR template appears to pop as it rotates when assigning the mesh for the motion controller a parent that is a box collision component. This does not appear to affect the right h ...