Unreal Engine Issues

"DynamicMaterialParameter1" in Dynamic Material Parameters module is initialized with "DynamicMaterialParameter0".

FAnimNode_TransitionPoseEvaluator uses FStackAttributeContainer to cache data over multiple frames

FAnimNode_TransitionPoseEvaluator can cache a pose over multiple frames using FStackAttributeContainer rather than the heap equivalent. This will likely crash at some point if any user uses the cac ...

The process may not return to the root node after the Wait Task is completed.

If the Wait Task is completed for the first frame, it may not return to the root node even after Finish. This can be avoided by increasing the wait time of the Wait Task (see CaseOK.mp4). When this ...

Switching LOD while using Evaluation Mode = Freeze in custom transit graph fails

If a user setups up a custom transition graph that caches one of the input poses by setting the Evaluator Mode property to Freeze then the node fails to deal with the situation where the LOD or mesh ...

[CrashReport] UE4Editor-MovieSceneTracks!UMovieSceneComponentMobilitySystem::RestorePreAnimatedState

[CrashReport] UE4Editor-MovieSceneTracks!UMovieSceneComponentMobilitySystem::RestorePreAnimatedState(IMovieScenePreAnimatedStateSystemInterface::FPreAnimationParameters const &) [MovieSceneComponent ...

Editor Crashes when adding the Start Matinee Camera Shake node to a Blueprint and playing in editor

When adding the Start Matinee Camera Shake node to a blueprint and then playing the project, the editor crashes. When regression testing in 4.26 however, I noticed that compiling the Third Person Ch ...

Mobile Joysticks snap to edge upon any input

When dragging the mobile joysticks in any direction, the snap to the edges regardless of how much the user inputs in said direction. This occurs with both the left and right joystick. This also occu ...

Grass does not show up when I override the Material of LandscapeComponent.

Regression checked in //UE4/Release-4.26.2 CL 15973114 the issue is not reproduced thee ...

ODSC - Launching a newly created project via UnrealFrontend fails to load some materials and crashes

The same repro steps on 4.26.2 will launch the project successfully. Packaging a project once to create complete ShaderMaps will work around the issue. ...

HiResScreenshot has incorrect masking when screenshot resolution scale does not match the viewport.

After a bit of investigation, the way to fix this would be to modify MergeMaskIntoAlpha to pass in the actual resolution scale and the requested size, and only mask the overlapping pixels. Currently ...